System Manual COMPACT MV POWER PLATFORM

Transcription

1 System Manual COMPACT MV POWER PLATFORM CoMVPP-SH-US_en Version 2.0 AMERICAN ENGLISH

2 Legal Provisions SMA America, LLC Legal Provisions Copyright 2014 SMA America, LLC. All rights reserved. No part of this document may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, be it electronic, mechanical, photographic, magnetic or otherwise, without the prior written permission of SMA America, LLC. Neither SMA America, LLC nor SMA Solar Technology Canada Inc. makes representations, express or implied, with respect to this documentation or any of the equipment and/or software it may describe, including (with no limitation) any implied warranties of utility, merchantability, or fitness for any particular purpose. All such warranties are expressly disclaimed. Neither SMA America, LLC nor its distributors or dealers nor SMA Solar Technology Canada Inc. nor its distributors or dealers shall be liable for any indirect, incidental, or consequential damages under any circumstances. (The exclusion of implied warranties may not apply in all cases under some statutes, and thus the above exclusion may not apply.) Specifications are subject to change without notice. Every attempt has been made to make this document complete, accurate and up-to-date. Readers are cautioned, however, that SMA America, LLC and SMA Solar Technology Canada Inc. reserve the right to make changes without notice and shall not be responsible for any damages, including indirect, incidental or consequential damages, caused by reliance on the material presented, including, but not limited to, omissions, typographical errors, arithmetical errors or listing errors in the content material. Trademarks All trademarks are recognized, even if not explicitly identified as such. A lack of identification does not mean that a product or symbol is not trademarked. The Bluetooth word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of these marks by SMA Solar Technology AG is under license. Modbus is a registered trademark of Schneider Electric and is licensed by the Modbus Organization, Inc. QR Code is a registered trademark of DENSO WAVE INCORPORATED. Phillips and Pozidriv are registered trademarks of Phillips Screw Company. Torx is a registered trademark of Acument Global Technologies, Inc. SMA America, LLC 3801 N. Havana Street Denver, CO U.S.A. SMA Solar Technology Canada Inc Matheson Blvd. E 7th Floor Mississauga, ON L4W 5K4 Canada 2 CoMVPP-SH-US_en-20 System Manual

3 Important Safety Instructions Important Safety Instructions SAVE THESE INSTRUCTIONS This manual contains important instructions for the following products: Compact MV Power Platform (CoMVPP-xxxxx-10) This manual must be followed during installation and maintenance. The product is designed and tested in accordance with international safety requirements, but as with all electrical and electronic equipment, certain precautions must be observed when installing and/or operating the product. To reduce the risk of personal injury and to ensure the safe installation and operation of the product, you must carefully read and follow all instructions, cautions and warnings in this manual. Warnings in this document A warning describes a hazard to equipment or personnel. It calls attention to a procedure or practice, which, if not correctly performed or adhered to, could result in damage to or destruction of part or all of the SMA equipment and/or other equipment connected to the SMA equipment or personal injury. Symbol Description DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury. WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury. CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury. NOTICE is used to address practices not related to personal injury. Warnings on this product The following symbols are used as product markings with the following meanings. Symbol Description Warning regarding dangerous voltage The product works with high voltages. All work on the product must only be performed as described in the documentation of the product. Beware of hot surface The product can become hot during operation. Do not touch the product during operation. Electric arc hazards The product has large electrical potential differences between its conductors. Arc flashes can occur through air when high-voltage current flows. Do not work on the product during operation. Risk of Fire Improper installation of the product may cause a fire. Observe the operating instructions Read the documentation of the product before working on it. Follow all safety precautions and instructions as described in the documentation. System Manual CoMVPP-SH-US_en-20 3

4 General Warnings SMA America, LLC General Warnings General Warnings All electrical installations must be made in accordance with the local and National Electrical Code ANSI/NFPA 70 or the Canadian Electrical Code CSA C22.1. This document does not and is not intended to replace any local, state, provincial, federal or national laws, regulation or codes applicable to the installation and use of the product, including without limitation applicable electrical safety codes. All installations must conform with the laws, regulations, codes and standards applicable in the jurisdiction of installation. SMA assumes no responsibility for the compliance or noncompliance with such laws or codes in connection with the installation of the product. Before installing or using the product, read all of the instructions, cautions, and warnings in this manual. Before connecting the product to the electrical utility grid, contact the local utility company. This connection must be made only by qualified personnel. Wiring of the product must be made by qualified personnel only. 4 CoMVPP-SH-US_en-20 System Manual

5 Table of Contents Table of Contents 1 Information on this Document Validity Content and Structure of the Document Target Group Additional Information Symbols Typographies Nomenclature Abbreviations Safety Intended Use Safety Precautions Personal Protective Equipment Transport and Mounting Safety Precautions for Transport and Mounting Requirement for Transport and Mounting Ambient Conditions Requirements for Transport by Truck Center of Gravity Transporting the MV Power Platform by Crane Transporting the MV Power Platform by Truck Securing the MV Power Platform for Transport by Truck Preparing the MV Power Platform for Unloading from Truck Removing the Base Plates from the MV Power Platform Removing the Lashing Chains and Tie-Down Straps Mounting the MV Power Platform Transporting the MV Power Platform to the Support Surface Fastening the MV Power Platform using Anchor Clips Installation Safety during Installation Sequence of Installation Work Preparatory Work Removing the Transport Locks Preparing the Cable Entry Position of the Base Plates Cable Entry into the Disconnect Unit Cable Entry into Sunny Central Inverters Cable Entry into the MV Transformer Cable Entry into the Auxiliary Services Rack Punching the Holes in the Base Plates Installing the Grounding Cable in the Base Platform Connection Overview Cable Requirements for Grounding Connecting the Grounding Pads System Manual CoMVPP-SH-US_en-20 1

6 Table of Contents SMA America, LLC 4.5 Installing the Grounding Cable in the Disconnect Unit Overview of the Connection Area Cable Requirements for Cables and Terminal Lugs Connecting the Grounding Cables in Disconnect Unit Connecting Grounding Cables in Sunny Central Installing the AC Connection in the MV Transformer Safety during AC Connection Overview of the Connection Area Position of the Deadbreak Bushings Circuit Diagram Connecting the AC Cables Checking the Cable Connection for Supply Voltage, Communication and Control Systems Overview of the Auxiliary Services Rack Installation Sequence Connecting the External Supply Voltage in the Brown Power Box Overview of the Connection Area Cable Requirements Inserting and Connecting the Cables Connecting the Communication in the Main Box Structure of the Communication Network Overview of the Connection Area Connecting the Communication in the Main Box Using Optical Fibers Connecting Analog Setpoints in the Main Box Overview of the Connection Area Cable Requirements Inserting and Connecting the Cables Connecting the External Fast Stop in the Main Box Overview of the Connection Area Cable Requirements Inserting and Connecting the Cables Connecting the Remote Shutdown in the Main Box Overview of the Connection Area Cable Requirements Inserting and Connecting the Cables Connecting the Insulation Monitoring in the Main Box Overview of the Connection Area Cable Requirements Inserting and Connecting the Cables Connecting the Tracker Motors in the Tracker Box Overview of the Connection Area Cable Requirements Inserting and Connecting the Cables Connecting a Customer-Specific Box Overview of the Connection Area Inserting and Connecting the Cables Installing the DC Connection Safety during DC Connection Cable Requirements Connecting the DC Cables in the Disconnect Units CoMVPP-SH-US_en-20 System Manual

7 Table of Contents Overview of the Connection Area Connecting the DC Cables in Disconnect Unit Connecting the DC Cables in Disconnect Unit Connecting the DC Cables to the Sunny Central Final Installation Work Sealing the Base Plates Mounting the Panels Disconnecting and Reconnecting Safety When Disconnecting and Reconnecting System and Equipment Disconnecting Means Overview of System Disconnecting Means - Power Circuit Overview of System Disconnecting Means - Supply Voltage Internal Supply Voltage External Supply Voltage Disconnecting the Compact MV Power Platform Switching off the Inverters Disconnecting the DC Side For Platforms with External DC Disconnects For Platforms with Internal DC Switch Disconnecting the AC Side Disconnecting the Supply Voltage Source For Platforms Configured for Internal Supply For Platforms Configured for External Supply Reconnecting the MV Power Platform Reconnecting the Supply Voltage Source For Platforms Configured for Internal Supply For Platforms Configured for External Supply Reconnecting the AC Source Reconnecting the DC Sources For Platforms with External DC Disconnects For Platforms with Internal DC Switches Restarting the Inverters System Disconnection Disconnecting the Inverter Disconnecting Both Inverters Disconnecting the Medium-Voltage Transformer Disconnecting the Tracker Motor Circuits Disconnecting the 120V Auxiliary Circuits of the Platform Operation System Settings via Touch Display Selecting the Language Setting the Date, Time and Time Zone Selecting the Display Format of the Touch Display Setting the Brightness of the Touch Display Changing the System Settings via the User Interface Setting the Language Setting the Date, Time and Time Zone System Manual CoMVPP-SH-US_en-20 3

8 6.2.3 Entering the Operator Name Resetting the SC-COM Changing the Password for the User Groups Customized Settings via XML File Uploading the custom.xml File Downloading the XML File custom.xml Deleting the custom.xml File XML File for Customer-Specific Settings Structure of the XML File custom.xml Parameters and Values for the custom.xml File Communication with Sunny Portal Information on Communication with Sunny Portal Accessing the SC-COM via Sunny Portal User Rights and Data Security User Groups Strength of Passwords Increasing Data Security Network Settings Configuring the Network Settings on the Computer Configuring the Inverter for the Local Network Information on Integrating the Inverter into a Local Network Configuring the Inverter for Static Networks Configuring Inverters for Dynamic Networks Adjusting Network Ports Displaying Operating Data Displaying the Operating Data on the Touch Display Displaying the Operating Data via the User Interface Displaying the Operation Data via Sunny Portal Registering the Inverter in Sunny Portal Adjusting the PV System Identifier for Sunny Portal Deleting the Sunny Portal Buffer Displaying the Event Report Saving the Operating Data Increasing Storage Capacity by Averaging Setting the Data Transmission Frequency Downloading Operating Data Using the FTP Server Defining Read and Write Access Rights for the FTP Server Accessing the FTP Server via the Internet Browser Sending Data via FTP Push Downloading Operating Data via HTTP Downloading Data in XML Format Downloading Data in CSV Format Saving the Operating Data on the Memory Card Information on Saving Data on a Memory Card Inserting the Memory Card Enabling Data Storage on the Memory Card Displaying the Memory Capacity Available on the Memory Card Setting the Parameters Grid Management Services CoMVPP-SH-US_en-20 System Manual

9 Setting the Power Frequency-Dependent Active Power Limitation Setting the Active Power Limitation Independent of the Frequency Setting the Reactive Power Control Setting Q at Night Setting Full and Limited Dynamic Grid Support (FRT) Grid Monitoring Setting the Line Voltage Monitoring Setting Power Frequency Monitoring Setting the Active Power Ramp-Up Setting the Decoupling Protection Ramp Setting the Voltage on the MV Transformer Setting the Secondary Voltage Setting the Primary Voltage Setting Optional Parameters Deactivating Transformer Protection Setting the Active Islanding Detection Project-Specific Parameters Setting the Country Activating Remote Shutdown Setting the Insulation Monitoring of the PV System Setting the Insulation Monitoring Device Switching between Main Menu and Standard Operation Selecting PV Modules Used Setting the Insulation Monitoring of the PV System with GFDI and an Insulation Monitoring Device Safety during Insulation Monitoring of the PV System with GFDI and an Insulation Monitoring Device Switching to Insulated Operation Switching to Grounded Operation Setting the Insulation Monitoring of the PV System with Remote GFDI and an Insulation Monitoring Device Information on Insulating PV Modules Equipped with Remote GFDI and Insulation Monitoring Device Switching to Insulated Operation Switching to Grounded Operation Integrating New Devices into the PV System Detecting New Devices Deleting Device Descriptions Updating the Firmware Information on Updating the Firmware Enabling Automatic Firmware Updates Updating Firmware via the User Interface Troubleshooting Safety during the Troubleshooting Reading Error Messages Reading Error Messages via Touch Display Reading Error Messages via the User Interface Acknowledging Error Messages Acknowledging the Error Messages via the Key Switch Acknowledging Error Messages via the User Interface Displaying the Error Message Delay Time Corrective Measures in Event of Disturbance System Manual CoMVPP-SH-US_en-20 5

10 7.4.1 Inverter Behavior in the Event of an Error Error Numbers 01xx to 13xx - Disturbance on the Utility Grid Error Number 34xx to 40xx - Disturbance on PV Array Error Numbers 60xx to 90xx - Disturbance on the Sunny Central Displaying Error Messages and Warnings for Active Power Limitation Displaying Error Messages and Warnings for the Reactive Power Setpoint Maintenance Safety during Maintenance Maintenance Schedule and Consumables Maintenance Work Every Twelve Months Sunny Central CP-US Disconnect Unit Auxiliary Services Rack MV Power Platform MV Transformer Maintenance Work Every 24 Months Sunny Central CP-US Disconnect Unit Auxiliary Services Rack MV Transformer Unscheduled Maintenance All Devices MV Transformer Repair Plan and Spare Parts Demand-Based Repairs Sunny Central CP-US MV Transformer Repair Every 10 Years Sunny Central CP-US Repair Every 13 Years Sunny Central CP-US General Maintenance Optical Inspection Cleaning the Interior Checking the Seals Checking the Latches, Door Stops and Hinges Checking the Switch Cabinet for Corrosion Sunny Central CP-US Maintenance after Disconnection General Maintenance Cleaning the Ventilation Plate Cleaning the Air Duct and the Insect Screens Checking the Fuses Checking the Bolted Connection of the Power Cabling Checking the Surge Arrester Checking the Safety Messages Maintenance After Connection of the Supply Voltage Safety CoMVPP-SH-US_en-20 System Manual

11 Checking the Integrated DC Switch Checking the Heating Elements, Hygrostat and Fans Maintenance when Medium Voltage, Low Voltage, DC Voltage and Supply Voltage are Present Safety Checking the DC Contactor in Units without the Integrated DC Switch Checking the AC Disconnect Reading off the Replacement Interval Meter Auxiliary Services Rack Maintenance after Disconnection General Maintenance Checking the Safety Messages Checking the Functionality of the Disconnect Switches Checking the Functionality of the Sun Shield Disconnect Unit Maintenance after Disconnection General Maintenance Checking the Bolted Connections of the Power Cabling Checking the Seal on the Front Panel Checking the Functionality of the DC Switches MV Transformer Maintenance after Disconnection General Maintenance Checking the Oil Separator and Oil Tray Cleaning the Oil Tray Behind the Oil Separator Testing the Transformer Oil Exchanging the Fuses (Green Power Fuses) in the MV Transformer Maintaining the MV Transformer Adjusting the MV Transformer Tank Pressure Periodic Actions Assembling and Disassembling Removing and Mounting the Protective Covers Working on the Inverter Removing the Panels Mounting the Panels Working on the Disconnect Unit Removing the Front Plate Mounting the Front Plate Cable Entry Inserting the Cables through the Base Plates Bolted Connections Connecting the Grounding Cable and DC Cable with One Two-Hole Terminal Lug Connecting the Grounding Cable and DC Cables with Two Two-Hole Terminal Lugs Clamp Connections Connecting the Cables to the Spring-Cage Terminals Connecting the Cable Shield Using a Shield Clamping Saddle Settings on the User Interface of the Inverter System Manual CoMVPP-SH-US_en-20 7

12 9.5.1 Logging Into the User Interface Logging Out of the User Interface Accessing the Parameter Overview Saving Parameter Changes Entering the Installer Password via Touch Display Product Description Overview of the MV Power Platform Design of the MV Power Platform Devices of the MV Power Platform Sunny Central Design and Function of the Sunny Central CP-US Sunny Central Communication Controller Integrated AC Disconnect Disconnect Unit MV Transformer Auxiliary Services Rack Operating and Display Elements Position of the Switches Key Switch on the Inverter Switch on the AC Disconnect in Sunny Central CP-US Switches on the Disconnect Unit Switches on the Auxiliary Services Rack Switches on the MV Transformer Touch Display of the Sunny Central Description of the Touch Display Explanation of Symbols User Interface of the Sunny Central Structure Structural View and Device View Insulation Monitoring Device LEDs of the SC-COM LEDs on the Enclosure LEDs on the Network Terminal LEDs on the Optical Fiber Terminals Operating States Safety Functions Manual Shutdown Functions Remote Shutdown External Fast Stop Automatic Shutdown Functions Grid Management Shutdown Transformer Protection Islanding Detection Active Islanding Detection External Islanding Detection Insulation Monitoring and Ground Fault Monitoring Operating Principles Ground Fault Detection and Interruption (GFDI) CoMVPP-SH-US_en-20 System Manual

13 Insulation Monitoring Device GFDI and Insulation Monitoring Device Advanced Remote GFDI and Insulation Monitoring Device Circuit Diagram Grid Monitoring How Grid Monitoring Works Monitoring the Line Voltage Monitoring the Power Frequency Grid Management Services Active Power Limitation Power Frequency-Dependent Active Power Limitation Frequency-Independent Active Power Limitation Selecting the Procedure with the Parameter P-WMod Off Procedure WCtlCom Procedure WCnst Procedure WCnstNom Procedure WCnstNomAnln Procedure Reactive Power Control Selecting the Procedure with the Parameter Q-VArMod Off Procedure VArCtlCom Procedure PFCtlCom Procedure VArCnst Procedure VArCnstNom Procedure VArCnstNomAnln Procedure PFCnst Procedure PFCnstAnln Procedure PFCtlW Procedure VArCtlVol Procedure VArCtlVolHystDb Procedure Q at Night Selecting the Mode with the Parameter QoDQ-VarMod No Q at Night: Off Procedure Q at Night with Operation Command via Modbus Protocol: WCtlCom Procedure Q at Night with Absolute Value: VArCnst Procedure Q at Night as a Percentage of the Nominal Power: VArCnstNom Procedure Q at Night via Standard Signal: VArCnstNomAnIn Procedure Q at Night Depending on the Line Voltage: VArCtlVol Procedure Measures for Voltage Support through Parameterization of Reactive Power/Voltage Characteristic Curve: VArCtlVolHystDb Procedure Full and Limited Dynamic Grid Support (FRT) Full Dynamic Grid Support (FRT) Limited Dynamic Grid Support (LVRT) Startup Behavior of the Inverter Active Power Ramp-Up Decoupling Protection Ramp Operating Data Power Limitation System Manual CoMVPP-SH-US_en-20 9

14 Error Channels Measured Values Internal Values of Device Internal Meters Service-Relevant Display Values Parameters Power Limitation Grid Monitoring/Grid Limits Grid Support Insulation Monitoring Internal Values of Device Technical Data CoMVPP 1.0 MW CP-US CoMVPP 1.25 MW CP-US CoMVPP 1.44 MW CP-US CoMVPP 1.5 MW CP-US CoMVPP 1.6 MW CP-US CoMVPP 1.7 MW CP-US CoMVPP 1.8 MW CP-US Appendix Mounting Information Requirements for the Mounting Location Requirements for the Support Surface Dimensions of the MV Power Platform Position of the Supporting Pillars Minimum Clearances Storage Installation Information Requirements for Cables and Terminal Lugs for PE, DC and AC Connections Torques Torques of PE, DC and AC Connections Torques for Panels, Grounding Cables and Protective Covers in the Inverter Type Labels MV Power Platform Inverter SC-COM Auxiliary Services Rack Main Box Inverter Box Tracker Box Brown Power Box MV Transformer AC Busway Symbols on the Type Label Contact CoMVPP-SH-US_en-20 System Manual

15 14 Revision History System Manual CoMVPP-SH-US_en-20 11

16 1 Information on this Document SMA America, LLC 1 Information on this Document 1.1 Validity This document is valid for the following device types: Compact MV Power Platform (CoMVPP-xxxxx-10) This document contains all the necessary information for operating the Compact MV Power Platform. 1.2 Content and Structure of the Document The sections in this document differ in their structure. Some sections are purely for information purposes and do not include any specific action requirements. Sections with action requirements may contain mandatory, recommended or selective action sequences. In the main sections with mandatory action sequence, you are obliged to work through the individual subsections in the given sequence. This will ensure that personal injury or property damage is avoided when work is being performed. In the main sections with selective action sequence, you will either need to select the individual subsections according to your requirement, or the relevant subsections will be cross-referenced in the document. In the main sections with recommended action sequence, SMA will give you a recommendation on how to proceed. In this case, however, it is not essential to work through the individual subsections in the given sequence. The following table gives you an overview of how the main sections of this document are structured and how to proceed in each case: Section Information provided Action sequence 1 Information on this Document Structure and handling of the document 2 Safety Safety-relevant information applicable throughout the entire document 3 Transport and Mounting Description of transport and mounting Mandatory 4 Installation Preparation and execution of the installation work Recommended 5 Disconnecting and Reconnecting Description of how to carry out proper disconnection Mandatory and reconnection of the product 6 Operation Description of possible actions to be taken during Selective operation 7 Troubleshooting Procedure in case of faults Selective 8 Maintenance Servicing and maintenance of the product Selective 9 Periodic Actions List of frequently repeated actions. At the respective place in the document, there is a cross-reference to the relevant action in this section Selective 10 Product Description Structure and functionality of the product and its devices 11 Technical Data Technical data of the product and its devices 12 Appendix Lists of errors and parameters, as well as supplementary information providing deeper insight into the technology and functionality of the product and its devices 13 Contact Contact information 12 CoMVPP-SH-US_en-20 System Manual

17 1 Information on this Document 1.3 Target Group This document is intended for qualified persons. Only qualified personnel are allowed to perform the tasks described in this document. A qualified person has been adequately trained and has demonstrated the ability and knowledge to install and operate electrical installations and to recognize and avoid possible hazards involved. Qualified persons are aware of the obligation to wear Hazard Risk Category 2 personal protective equipment and always comply with the general safety regulations for dealing with electric voltage. Qualified persons have been trained in how to deal with the dangers and risks associated with installing electrical installations as specified in 29 CFR, Part 1910 (OSHA), Subpart S, NEC, and NFPA 70E, and possess all the necessary knowledge for averting danger. There must be written documentation of their training. 1.4 Additional Information Additional information is available in the download area at Document title Planning Information for the Compact MV Power Platform Interface for Modbus Communication SUNNY WEBBOX / SC-COM Modbus Interface SC-COM Modbus Interface (Modbus information including the Zone Monitoring option) Document type Submittal Package Technical Description Technical Description 1.5 Symbols Symbol Explanation Information that is important for a specific topic or goal, but is not safety-relevant Indicates a requirement for meeting a specific goal Desired result A problem that might occur 1.6 Typographies Typography Usage Example bold Display messages Elements on a user interface Parameter Terminals Slots Elements to be selected or entered Select the parameter ExlTrfErrEna and set to Off. Select the tab Parameters. > Connects several elements to be selected Select Plant > Detect. [Button/Key] The button or key to be selected or pressed Select [Start detection]. System Manual CoMVPP-SH-US_en-20 13

18 1 Information on this Document SMA America, LLC 1.7 Nomenclature The products installed on the Compact MV Power Platform (inverter, Auxiliary Service Rack, DC Disconnect Unit, MV transformer) are referred to as "devices". The following nomenclature is used in this document: Complete designation SMA America, LLC SMA Solar Technology Canada Inc. Compact MV Power Platform Medium-voltage step-up transformer Sunny Central Communication Controller Designation in this Document SMA SMA MV Power Platform MV transformer SC-COM 1.8 Abbreviations In this document, abbreviations are used at certain points. In the following table, you will find the full designation and an explanation, where applicable. Abbreviation Designation Explanation AC Alternating Current DC Direct Current FRT Fault Ride-Through Dynamic grid support GFDI Ground-Fault Detection Interruption IP Internet Protocol Uninterruptible Power Supply LVRT Low-Voltage Ride-Through Limited dynamic grid support MPP Maximum Power Point OF Optical Fiber PC Personal Computer PE Protective Earth Protective conductor PV Photovoltaics UPS Uninterruptible Power Supply 14 CoMVPP-SH-US_en-20 System Manual

19 2 Safety 2 Safety Read this section carefully before starting work. In this section you will find generally applicable, safety-relevant information which you must comply with while carrying out all work on the product. Read this section very carefully in order to prevent personal injury and property damage and to ensure long-term operation of the product. 2.1 Intended Use The MV Power Platform is a complete system for large-scale PV power plants. All devices required to convert the direct current generated by the PV modules into alternating current and to feed this into the medium-voltage grid are located on the MV Power Platform. The MV Power Platform is suitable for outdoor installation. All devices installed on the MV Power Platform comply with NEMA 3R and are authorized for use under conditions of precipitation. Only persons fulfilling all the skills for the target group are permitted to work on or with the MV Power Platform. The intended use of the MV Power Platform will only be possible if you have read and fully understood this document, especially the Safety section. The MV Power Platform may only be operated providing that the maximum permissible DC input voltage and the permitted ambient conditions are observed. The permissible DC input voltage and the permitted ambient conditions are subject to the respective configuration of the MV Power Platform. Ensure that the maximum permissible DC input voltage and the permitted ambient conditions are complied with prior to commissioning the MV Power Platform. All work on the MV Power Platform must be performed using the appropriate tools and in compliance with the ESD protection regulations. NFPA 70E Table 130.7(C)(16) Hazard Risk Category 2 personal protective equipment is to be worn by all persons working on or with the MV Power Platform. The MV Power Platform must not be installed, operated or maintained by unauthorized persons. Rebuilding, modification or installation of additional components on the MV Power Platform or its constituent devices must not be performed without the express consent of SMA. Any rebuilding, modification or installation of additional components performed with the consent of SMA will be subject to customer liability. SMA does not grant any warranty for such modifications. Unauthorized installations and modifications compromise operational safety and void the operation permission and warranty claims. The MV Power Platform must only be operated when all the installed components are closed, locked and in perfect working order. The devices of the MV Power Platform must not be opened during duststorm, precipitation or at a humidity of over 95%. Any use of the MV Power Platform other than that described in the Intended Use section does not qualify as appropriate. System Manual CoMVPP-SH-US_en-20 15

20 2 Safety SMA America, LLC 2.2 Safety Precautions This section contains safety precautions that must be observed at all times when working on or with the product. To prevent personal injury or property damage and to ensure long-term operation of the product, read this section carefully and follow all safety precautions at all times. Danger to life from electric shock due to live voltage There are high voltages present in the MV Power Platform and its components. Touching live components results in death or serious injury due to electric shock. When working in a high contact-risk environment, wear Hazard Risk Category 2 personal protective equipment. Always perform work in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA), NEC, and NFPA 70E. Do not touch live components. Follow the instructions precisely. Observe all safety messages on the product and in the documentation. Before performing any work on the MV Power Platform, always disconnect all devices whenever live voltage is not absolutely necessary. Ensure that no disconnected devices can be reconnected. After disconnecting the MV Power Platform, wait at least 15 minutes until the MV Power Platform capacitors have discharged completely. Before performing any work on the MV Power Platform, ensure that no voltage is present in any of the devices. Danger to life from electric shock due to live DC cables DC cables connected to PV modules that are exposed to sunlight are live. Trying to connect live DC cables will result in death or serious injury. Wear Hazard Risk Category 2 personal protective equipment for all work on the MV power platform. Prior to connecting the DC cables, ensure that the DC cables are voltage-free. Danger to life from electric shock due to ground fault If a ground fault has occurred, parts of the plant that are supposedly grounded may in fact be live. Touching incorrectly grounded components can result in death or very serious injuries from electric shock. Before working on the plant, ensure that no ground fault is present and the GFDI breaker is closed. Ensure that no voltage is present. If there is a possibility of the grounded conductor becoming ungrounded, use additional grounding straps. Wear Hazard Risk Category 2 personal protective equipment for all work on the MV power platform. Danger to life from electric shock when entering the PV field Ground fault monitoring with GFDI and Advanced Remote GFDI does not provide protection from injury when GFDI is activated. PV modules grounded by GFDI discharge voltage to ground. Entering the PV field may lead to lethal electric shocks. Before entering the PV field, switch the PV array to insulated operation. Ensure that the insulation resistance of the PV array is greater than 1 k Ω. 16 CoMVPP-SH-US_en-20 System Manual

21 2 Safety Danger to life from electric shock if the MV Power Platform is damaged Operating a damaged MV Power Platform can lead to hazardous situations that result in death or serious injuries due to electric shock. Only use the MV Power Platform when it is technically faultless and in an operationally safe state. Regularly check the MV Power Platform for visible damage. Make sure that all external safety equipment is freely accessible at all times. Make sure that all safety equipment is in good working order. Wear Hazard Risk Category 2 personal protective equipment for all work on the MV Power Platform. Danger to life from electric shock even if the inverter is disconnected on the AC and DC sides The precharge unit of the option "" is also live if the AC contactor and the DC switch are open. Touching live components of this assembly will result in death or serious injury. Do not touch live components. Do not remove protective covers. Observe the warning messages. Wear Hazard Risk Category 2 personal protective equipment. Danger to life due to electric shock if devices are left unlocked If devices are left unlocked, unauthorized persons will have access to components in which lethal voltages are present. Touching live components results in death or serious injury due to electric shock. Always close and lock all devices on the MV Power Platform. Ensure that unauthorized persons do not have access to the plant. Risk of fire due to failure to observe torque specifications on high-voltage bolted connections Failure to follow the specified torques reduces the ampacity of live screw connections so that the contact resistances increase. This can cause components to overheat and catch fire. Ensure that high-voltage bolted connections are always executed with the exact torque specified in this document. Only use suitable tools when working on the device. Avoid repeated tightening of high-voltage bolted connections as this may result in inadmissibly high torques. Danger to life due to blocked escape routes In hazardous situations, blocked escape routes can lead to death or serious injury. An escape route with a width of at least 3 ft. (915 mm) must be available at all times. Do not place any objects in the escape route area. Remove all tripping hazards from the escape routes. System Manual CoMVPP-SH-US_en-20 17

22 2 Safety SMA America, LLC Danger of falling from elevated MV Power Platform If safety precautions are not observed, the qualified person could fall off MV Power Platform and be injured. If the MV Power Platform is elevated, erect catwalks with banisters. When carrying out any work on the MV Power Platform, always wear suitable personal protective equipment. Risk of burns due to hot devices or components Some devices or components on the MV Power Platform can reach high temperatures during operation. Touching these components can result in burn injuries. Observe the safety warnings on the devices. During operation, do not touch any devices or components marked with such warnings. After disconnecting the plant, wait until any hot components or devices, e.g., the MV transformer, have cooled down sufficiently. When carrying out any work on the MV Power Platform, always wear suitable personal protective equipment. Damage to the devices due to dust or moisture penetration Dust or moisture penetration can damage the devices of the MV Power Platform or impair their functionality. Do not open any devices during a duststorm, precipitation or when humidity exceeds 95%. Perform maintenance on the devices only when the environment is dry and free of dust. Damage to electronic components due to electrostatic discharge Electrostatic discharge can damage or destroy electronic components. When working on the MV Power Platform and handling the assemblies, observe the ESD safety regulations. Wear suitable personal protective equipment for all work on the devices. Discharge electrostatic charge by touching uncoated, grounded enclosure parts (e.g. at the PE connection on the doors). Only then is it safe to touch any electronic components. Damage to the devices of the Auxiliary Services Rack due to direct solar irradiation on the back of the Auxiliary Services Rack Direct solar irradiation on the back of the Auxiliary Services Rack can cause the devices getting too hot. High temperatures can damage the components or impair their functionality. Align the MV Power Platform with the front side of the Auxiliary Services Rack facing East, South or West. This prevents the back of the Auxiliary Services Rack from getting too hot. Providing a catwalk for MV Power Platforms installed in an elevated position If the Base Frame of the MV Power Platform is positioned more than 2 in. (50 mm) above ground level for one of the selected installation types, a catwalk around the platform as well as railings and stairs for the catwalk must be provided for maintenance work and operating the MV Power Platform. The catwalk, railings and stairs must meet the applicable requirements of the OSHA, NEC and AHJ directives. The catwalk is to be provided and installed by the customer. The catwalk must be mounted prior to SMA commissioning activities. 18 CoMVPP-SH-US_en-20 System Manual

23 2 Safety 2.3 Personal Protective Equipment Always wear the personal protective equipment recommended by SMA America, LLC when working on the MV Power Platform. All clothing should be in accordance with NFPA 70E Section Appropriate Insulated gloves for shock protection in accordance with NFPA 70E Section 130.7(C), rated at least 1000V shall be worn as required. Any other prescribed protective equipment must also be used. When carrying out work on live parts of the MV Power Platform, protective equipment of at least Hazard Risk Category 2 is required in accordance with NEMA NFPA 70E, Table 130.7(C)(16). Hazard Risk Category 2 protective equipment required In accordance to NFPA 70E, an arc flash hazard risk analysis has been performed by SMA, and appropriate Arc Flash Hazard labels stating the required Personal Protective Equipment (PPE) for exposed, energized interaction with the equipment, are installed. Hazard Risk Category 2 PPE is the requirement for all routine maintenance, diagnostics, and commissioning activities as described in the SMA protocols. Areas within the machine also exist that cannot, under any circumstances, be exposed while energized. For additional information, please contact the SMA Service Line. System Manual CoMVPP-SH-US_en-20 19

24 3 Transport and Mounting SMA America, LLC 3 Transport and Mounting Once you have taken all the preparatory measures for installing the MV Power Platform, it can be transported to the mounting location. This section explains which transport options SMA recommends and what precautions you need to take during transport in order to avoid personal injury or property damage. 3.1 Safety Precautions for Transport and Mounting Danger of crushing if the lifted MV Power Platform tips over, falls, or sways during lifting If the MV Power Platform is lifted and transported too fast or without due care, it may tip over, fall or sway. Transport the MV Power Platform as close to the ground as possible. Do not stand under the lifted MV Power Platform. Use all suspension points for transportation. When lifting with a crane, use a hoist which is designed for the weight of the MV Power Platform. Avoid fast or jerky movements during transport of the MV Power Platform. Keep a safe distance from the MV Power Platform during transport. All means of transport used must be designed for the weight of the MV Power Platform. Do not transport the MV Power Platform using a forklift truck. Before lifting the MV Power Plattform remove snow and other loads. Damage to the devices of the Auxiliary Services Rack due to direct solar irradiation on the back of the Auxiliary Services Rack Direct solar irradiation on the back of the Auxiliary Services Rack can lead to overheating of the components. High temperatures can damage the components or impair their functionality. Align the MV Power Platform with the front side of the Auxiliary Services Rack facing East, South or West. This prevents the back of the Auxiliary Services Rack from getting too hot. Damage to the MV Power Platform due to improper temporary storage If the MV Power Platform is not stored appropriately, the frame construction and the devices of the MV Power Platform may be damaged. Dust and moisture can penetrate the devices of the MV Power Platform and damage electronic components. Do not place the MV Power Platform on an unstable, uneven surface. Prior to storage, ensure that the doors of all devices are closed and that the base plates have not been removed. Damage to the Auxiliary Service Rack during transport due to heavy snow load Snow on the Auxiliary Services Rack can damage the roof and devices and impair their functions during transport. Before transporting remove snow from the Auxiliary Services Rack. 3.2 Requirement for Transport and Mounting Ambient Conditions The mounting location must be freely accessible at all times. The maximum permissible gradient of the access road is 4%. While unloading the minimum clearances to neighboring obstacles must be observed. All requirements for the ambient conditions must be met (see Section 11 "Technical Data", page 253). 20 CoMVPP-SH-US_en-20 System Manual

25 3 Transport and Mounting Requirements for Transport by Truck A trailer with a pneumatic suspension has to be used. SMA recommends using a double drop trailer. The MV transformer of the MV Power Platform must be positioned as close as possible to the tractor. The MV Power Platform has to be loaded flat and without further blockings under the MV Power Platform on the trailer. The MV Power Platform has to be positioned loaded on and unloaded from the trailer suing a heavy-duty crane. Using forklift trucks is not allowed Center of Gravity The center of gravity of the MV Power Platform is not in the middle of the unit. Take this into consideration when transporting the MV Power Platform. The center of gravity varies according to the selected option and power class of the inverters. The exact position of the center of gravity is indicated in the project-specific weight and structural calculation of the MV Power Platform. The lifting lugs are aligned at the MV Power Platform in such a way that safe transport can be guaranteed. The variations of the center of gravity must be compensated accordingly by extending the chains at the lifting lugs using shackles. 3.3 Transporting the MV Power Platform by Crane Figure 1: Position of the lifting lugs at the MV Power Platform with Disconnect Unit Figure 2: Position of the lifting lugs at the MV Power Platform without Disconnect Unit System Manual CoMVPP-SH-US_en-20 21

26 3 Transport and Mounting SMA America, LLC Figure 3: Bolted connection for attaching the lifting lugs Position A B C D E Designation Nut Spring washer Screw Lifting lug MV Power Platform Requirements: The crane and hoist must be suitable for the weight of the MV Power Platform. The hoist is properly attached to the crane. Procedure: 1. Attach the lifting lugs. Only use the screws, nuts and washers included in the scope of delivery (torque for slightly oiled screws: 708 ft-lbs (960 Nm)). 2. Attach the hoist to all six lifting lugs on the MV Power Platform with Disconnect Unit. 22 CoMVPP-SH-US_en-20 System Manual

27 3 Transport and Mounting 3. Attach the hoist to all four lifting lugs on the MV Power Platform without Disconnect Unit. 4. Raise the MV Power Platform slowly until the hoist is evenly taut. If the MV Power Platform is not level when raised, lower it back down to the ground. Make sure that the hoist is properly aligned to ensure that the MV Power Platform can be lifted level. If necessary, extend the chains of the hoist using shackles to ensure that the MV Power Platform is in a horizontal position. The angle should be smaller than Ensure that the hoist is attached correctly. 6. Raise the MV Power Platform slightly. 7. Transport the MV Power Platform to the end location as close to the ground as possible. 8. Set the MV Power Platform down. The support surface must be suitable for the weight of the MV Power Platform. 9. Prior to road transport, remove the lifting lugs. With lifting lugs attached, the maximum permissible width for road transport is exceeded. 3.4 Transporting the MV Power Platform by Truck Securing the MV Power Platform for Transport by Truck Prior to transporting the MV Power Platform by truck, it must be adequately secured. Comply with manufacturer specifications When using lashing chains or tie-down straps to secure the MV Power Platform, always follow the instructions of the lashing equipment manufacturer. Figure 4: Positions of the tie-down brackets at the MV Power Platform with Disconnect Unit System Manual CoMVPP-SH-US_en-20 23

28 3 Transport and Mounting SMA America, LLC Figure 5: Positions of the tie down brackets at the MV Power Platform without Disconnect Unit Requirements: The lifting lugs have been removed from the MV Power Platform. The lifting lugs are properly stowed and secured against slipping. Procedure: 1. Hook the lashing chains into the anchor lugs. 2. Attach the tie-down straps to the means of transport. 3. Secure the lashing chains and tie-down straps on the means of transport. The lashing chains and tie-down straps must be sufficiently tensioned. This will prevent the MV Power Platform from slipping during transport Preparing the MV Power Platform for Unloading from Truck Prior to unloading the MV Power Platform, certain preparations must be made. Otherwise, you might encounter problems when setting the MV Power Platform down on the installation foundation. Take these preparatory measures in order to avoid damage to cables and conduits Removing the Base Plates from the MV Power Platform Figure 6: Position of the base plates and enclosure openings for the MV Power Platform with Disconnect Unit (top view). 24 CoMVPP-SH-US_en-20 System Manual

29 3 Transport and Mounting Position A B C Designation Base plate of the MV transformer Base plates of the Disconnect Units Base plates of the Auxiliary Services Rack Figure 7: Position of the base plates and openings for cable entries at the MV Power Platform without Disconnect Unit (top view). Position A B C Designation Base plate of the MV transformer Base plates of the inverters Base plates of the Auxiliary Services Rack Figure 8: Position of the base plates (side view) Position A B Designation Base plates of the Disconnect Units Base plate of the Auxiliary Services Rack Requirements: The MV Power Platform must be at the mounting location. System Manual CoMVPP-SH-US_en-20 25

30 3 Transport and Mounting SMA America, LLC Procedure: Remove the base plates from the MV Power Platform. Safely store the screws and washers for mounting Removing the Lashing Chains and Tie-Down Straps Risk of injury when releasing tie-down straps and lashing chains Since there is tension on the tie-down straps and lashing chains, there is a risk of whiplash when they are released. This can result in cuts or crushing. Ensure that the tie-down straps and lashing chains cannot whiplash when released. Observe all manufacturer instructions on handling the tie-down straps and lashing chains. Requirements: The MV Power Platform must be at the mounting location. The base plates are removed (see Section , page 24). Procedure: 1. Release the tie-down straps (see relevant documentation). 2. Release the lashing chains (see relevant documentation). 3.5 Mounting the MV Power Platform The MV Power Platform can be mounted on various foundations. The foundation used must be suitable for the weight of the MV Power Platform (see Section 12.1 "Mounting Information", page 266). There are the following possibilities for the support surface: Concrete piers Concrete beams Concrete pad Ballast substructure In order to facilitate access to the MV Power Platform, SMA recommends inserting the base frame of the MV Power Platform into the ground in such a way that the base frame is flush with the ground level. In the case of the MV Power Platform with the oil tray option, you must take into account that there is enough space for the oil separator and the necessary maintenance work before inserting the MV Power Platform. The customer is responsible for anchoring the MV Power Platform on the support surface. In the following, SMA describes how to attach the MV Power Platform using anchor clips. This type of anchoring is just an example. It is the responsibility of the civil engineer of record to decide on the method of anchoring to be used. Providing a catwalk for MV Power Platforms installed in an elevated position If the base frame of the MV Power Platform is positioned more than 2 in. (50 mm) above ground level for one of the selected installation types, a catwalk around the platform as well as railings and stairs for the catwalk must be provided for maintenance work and operating the MV Power Platform. The catwalk, railings and stairs must meet the applicable requirements of the OSHA, NEC and AHJ directives. The catwalk is to be provided and installed by the customer. The catwalk must be mounted prior to SMA commissioning activities. 26 CoMVPP-SH-US_en-20 System Manual

31 3 Transport and Mounting Transporting the MV Power Platform to the Support Surface Requirements: The support surface must be prepared for installation of the MV Power Platform (see Section 12.1, page 266). The MV Power Platform must be prepared for unloading (see Section 3.4.2, page 24). A suitable crane and hoist must be available. Procedure: 1. Transport the MV Power Platform by crane to the support surface (see Section 3.3, page 21). 2. Route the connection cables through the base plates into the MV Power Platform. Make sure not to damage the cables. 3. Set the MV Power Platform down on a suitable support surface Fastening the MV Power Platform using Anchor Clips The MV Power Platform can be attached to the foundation by means of anchor clips. At least six anchor points should be used for the MV Power Platform with Disconnect Unit and the anchor points should located as close as possible to the lifting lugs. For the MV Power Platform without Disconnect Unit at least four anchor points are to be used. The anchor clips are not included in the scope of delivery and must be provided by the customer. Figure 9: Optimum anchoring points for the anchor clips of the MV Power Platform with Disconnect Unit. Position A Designation Optimum anchoring points for anchor clips Figure 10: Optimum anchoring points for the anchor clips of the MV Power Platform without Disconnect Unit. Position A Designation Optimum anchoring points for anchor clips System Manual CoMVPP-SH-US_en-20 27

32 3 Transport and Mounting SMA America, LLC Figure 11: Fastening the MV Power Platform using anchor clips (example) Position A B C D E Designation Base frame of the MV Power Platform Support surface on which the MV Power Platform is installed Anchor clip Washer Screw Additionally required mounting material (not included in the scope of delivery): Six anchor clips for MV Power Platform with Disconnect Unit Six washers for MV Power Platform with Disconnect Unit Six screws for MV Power Platform with Disconnect Unit Four anchor clips for MV Power Platform without Disconnect Unit Four washers for MV Power Platform without Disconnect Unit Four screws for MV Power Platform without Disconnect Unit The size of the screws and the required torque should be determined by the professional engineer who also calculated the foundation design. These calculations are project-specific. The calculations are the responsibility of the customer or the civil engineer of record. Procedure: Fasten the MV Power Platform with anchor clips to the foundation using suitable screws and adequate torque. 28 CoMVPP-SH-US_en-20 System Manual

33 4 Installation 4 Installation 4.1 Safety during Installation In this section, you will find safety precautions which you must observe throughout the entire process of making the DC connection. Read this section carefully and follow the instructions to prevent personal injury and property damage and to ensure smooth operation of the inverter. The DC inputs are isolated from the enclosure and the system grounding. If required by section 250 of the National Electrical Code, ANSI/NFPA 70, the installer is responsible for this grounding. System Manual CoMVPP-SH-US_en-20 29

34 4 Installation SMA America, LLC Danger to life from electric shock due to live voltage There are high voltages present in the MV Power Platform and its components. Touching live components results in death or serious injury due to electric shock. When working in a high contact-risk environment, wear Hazard Risk Category 2 personal protective equipment. Always perform work in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA), NEC, and NFPA 70E. Do not touch live components. Follow the instructions precisely. Observe all safety messages on the product and in the documentation. Before performing any work on the MV Power Platform, always disconnect all devices whenever live voltage is not absolutely necessary. Ensure that no disconnected devices can be reconnected by following an OSHA-compliant lockout-tagout procedure. After disconnecting the MV Power Platform, wait at least 15 minutes until the inverter capacitors have discharged completely. Before performing any work on the MV Power Platform, ensure that no voltage is present in any of the devices. Entry to specially marked areas is prohibited when they are live. Danger to life from electric shock due to live DC cables DC cables connected to PV modules that are exposed to sunlight are live. Trying to connect live DC cables will result in death or serious injury. Prior to connecting the DC cables, ensure that the DC cables are voltage-free. When carrying out any work on the MV Power Platform, wear Hazard Risk Category 2 personal protective equipment. Danger to life from electric shock due to live AC voltage High voltages are present in the live components of the low-voltage and medium-voltage grids. Touching live components results in death or serious injury. Observe all safety regulations for working with the low-voltage and medium-voltage grid. Disconnect the AC and DC circuit breakers and ensure that they cannot be accidentally reconnected by following an OSHA-compliant Lockout-Tagout procedure. Disconnect the MV Power Platform from the DC sub-distributions and DC main distribution. Ensure that no voltage is present. When carrying out any work on the MV Power Platform, wear Hazard Risk Category 2 personal protective equipment. 30 CoMVPP-SH-US_en-20 System Manual

35 4 Installation Risk of fire due to insufficiently dimensioned connection cables If the ampacity of the connection cables is too low, they can overheat and pose a fire risk. All cable cross-sections must be designed for the maximum possible current. All cables must be laid in compliance with the local regulations. The stipulated ambient conditions must be complied with. Only use aluminum cables or copper cables. Risk of fire due to faulty connections or oxidized contact surfaces In case of faulty connections or oxidized contact surfaces, sufficient ampacity can no longer be ensured. This may result in connections being subject to overheating and fire hazard. Only use the nuts, screws and washers included in the scope of delivery for the connection. Only use tin-plated terminal lugs. The fender washers and spring washers must not protrude the terminal lug. Always connect two-hole terminal lugs using two screws. Before connecting the cables, clean the contact surfaces. Do not touch the cleaned contact surfaces. Always adhere to the specified torque when establishing the connections. Risk of fire due to failure to observe torque specifications on live bolted connection Failure to follow the specified torques reduces the ampacity of live bolted connections so that the contact resistances increase. This can cause components to overheat and catch fire. Ensure that live bolted connections are always executed with the exact torque specified in this document. Only use suitable tools when working on the device. Avoid repeated tightening of live bolted connections as this may result in inadmissibly high torques. Risk of burns due to hot components The components and devices of the MV Power Platform can reach high temperatures. Touching these components can result in burns. Do not touch hot components. Wait until hot components have sufficiently cooled down. Observe the safety warnings on the MV Power Platform and its devices. When carrying out any work on the MV Power Platform and its devices, wear Hazard Risk Category 2 personal protective equipment. Damage to electronic components due to electrostatic discharge Electrostatic discharge can damage or destroy electronic components. Observe the ESD safety regulations when working on the device. When carrying out any work on the MV Power Platform and its devices, wear Hazard Risk Category 2 personal protective equipment. Neutralize any electrostatic charge before touching electronic components, for example, by touching the grounding connection of the doors. System Manual CoMVPP-SH-US_en-20 31

36 4 Installation SMA America, LLC 4.2 Sequence of Installation Work The sequence of installation work given in this section is recommended by SMA. It is important to begin the installation with the preparatory work and the grounding connection. Therefore, SMA recommends that you adhere to this sequence to avoid problems during the installation. Recommended procedure: 1. Preparatory work 2. Grounding connection at the base frame 3. Grounding connection in the Disconnect Units or Grounding connection in the inverters 4. AC connection in the MV transformer 5. Cable connection for supply voltage, communication and control systems on the Auxiliary Services Rack 6. DC connection in the Disconnect Units or DC connection in the inverters 4.3 Preparatory Work In order to ensure that the installation runs as smoothly as possible, SMA recommends performing certain preparatory work prior to beginning with the installation work Removing the Transport Locks Remove the packaging from the Auxiliary Services Rack and from the air ducts of the Sunny Central inverters Preparing the Cable Entry Prior to starting the actual installation work, prepare the interface gland plates for cable entry. 32 CoMVPP-SH-US_en-20 System Manual

37 4 Installation Position of the Base Plates MV Power Platform with Disconnect Unit Figure 12: Position of the base plates on the MV Power Platform with Disconnect Unit Position A B C Designation Base plate of MV transformer Base plates of the Disconnect Units Base plates of the Auxiliary Services Rack MV Power Platform without Disconnect Unit Figure 13: Position of the base plates on the MV Power Platform without Disconnect Unit Position A Designation Base plate of MV transformer System Manual CoMVPP-SH-US_en-20 33

38 4 Installation SMA America, LLC Position B C Designation Base plates of the Sunny Central Base plates of the Auxiliary Services Rack Cable Entry into the Disconnect Unit The DC cables and grounding cables are inserted into the Disconnect Unit through the interface gland plates of the MV Power Platform. The interface gland plates must be prepared for this purpose. Below, you will find an example of the hole arrangement in the interface gland plates. Figure 14: Arrangement of holes for cable entry into the Disconnect Unit (example) Position A Designation Holes for DC and grounding cables Cable Entry into Sunny Central Inverters If the MV Power Platform is not equipped with Disconnect Units, the DC cables and grounding cables must be inserted in the Sunny Central Cable Entry into the MV Transformer The AC cables are inserted into the MV transformer through the interface gland plates of the MV Power Platform. The interface gland plate must be prepared for this purpose. Below, you will find an example of the hole arrangement in the interface gland plate. Figure 15: Arrangement of holes for cable entry into the MV Transformer (example) Position A Designation Holes for bundled AC conductors Cable Entry into the Auxiliary Services Rack All cables for supply voltage, communication and control systems to be connected to the Auxiliary Services Rack must be routed into the Auxiliary Services Rack through the interface gland plate of the Pull Box. 34 CoMVPP-SH-US_en-20 System Manual

39 4 Installation Punching the Holes in the Base Plates Requirements: The MV Power Platform must be at the final installation site. The base plates must be removed (see Section , page 24). If the cables are not laid in a concrete plate, they must be routed in conduits. Additionally required mounting material (not included in the scope of delivery): Suitable tool for punching the holes in the base plates (e.g., stamping tool). Procedure: 1. Mark all holes for conduits on the base plate in accordance with the cable arrangement. 2. Punch the holes. 4.4 Installing the Grounding Cable in the Base Platform Connection Overview The MV Power Platform is equipped at two points with grounding pads which provide the possibility of external grounding. The grounding pads made of stainless steel are connected by cable from the grounding busbar in the MV transformer. The external grounding must be executed by the customer on-site in accordance with the grounding concept of the entire PV system. Influencing factors are the conditions or conductivity of the soil, the lightning protection system and the type of ground electrode. The ground electrodes can, for instance, be executed as grounding straps or grounding electrodes. MV Power Platform with Disconnect Unit Figure 16: Position of the grounding points of the MV Power Platform with Disconnect Unit System Manual CoMVPP-SH-US_en-20 35

40 4 Installation SMA America, LLC MV Power Platform without Disconnect Unit Figure 17: Position of the grounding points of the MV Power Platform without Disconnect Unit Bolted connection of the grounding pads Figure 18: Bolted connection of the grounding pads Position A B C D E F Designation Nut Spring washer Fender washer Ground electrode with two-hole terminal lug Stainless steel plate Screw Cable Requirements for Grounding Wire sizing in accordance to the National Electric Code The grounding of the PV system must be executed in accordance with the requirements of Sections to of the National Electrical Code ANSI/NFPA 70 and is the responsibility of the qualified person. 36 CoMVPP-SH-US_en-20 System Manual

41 4 Installation Connecting the Grounding Pads Requirements: All cable requirements must be complied with. Any additionally required material must be available. Additionally required mounting material (not included in the scope of delivery): Screws, M12 Spring washers, external diameter: 29 mm, internal diameter: 13.5 mm, thickness: 1.25 mm Fender washers, external diameter: 32 mm, internal diameter: 13 mm Nuts, M12 Ground electrodes of the PV system suitable for the grounding concept of the PV system Clean cloth Ethanol cleaning agent Non-woven abrasive Suitable material for sealing the grounding pads (e.g. durable zinc paint) Grounding the MV Power Platform Ground the MV Power Platform in accordance with the applicable regulations. There are two ground connections provided on the MV Power Platform. SMA recommends connecting both grounding pads to the ground electrode of the PV system. Procedure: 1. Install the ground electrode of the PV system in accordance with the applicable regulations. 2. Ensure that the required grounding resistance is reached. 3. If insulated grounding cables are used, strip the insulation off the cables. 4. Fit the grounding cables with terminal lugs. 5. Clean the contact surfaces with the non-woven abrasive until they have a light metallic sheen. At the same time, ensure that the coated contact surfaces are not damaged. 6. Clean the contact surfaces using a clean cloth and ethanol cleaning agent. 7. Remove metal dust with a clean cloth. 8. Do not touch the cleaned contact surfaces. 9. Connect the grounding cables to the grounding pads. 10. Connect the grounding cables to the ground electrodes of the PV system. 11. Seal the grounding pads and terminals. System Manual CoMVPP-SH-US_en-20 37

42 4 Installation SMA America, LLC 4.5 Installing the Grounding Cable in the Disconnect Unit Overview of the Connection Area Figure 19: Connection area of the Disconnect Unit Position A Designation Grounding busbar Cable Requirements for Cables and Terminal Lugs In addition to the general cable requirements (see Section , page 271), the following requirements are applicable: Cables: Conductor ampacity must comply with NEC articles 310 and 690. Terminal lugs: Connect a maximum of two cables to one terminal position on the grounding busbar. Information on torques The torques specified in the following table are the torques used to mount the terminal lugs to the copper bar. Connection option Cable cross-section Torque Cable connection with aluminum terminal lugs 4 AWG to 800 kcmil 27.5 ft.-lbs. (37 Nm) (25 mm 2 to 405 mm 2 ) Cable connection with copper terminal lugs 4 AWG to 800 kcmil (25 mm 2 to 405 mm 2 ) Connecting the Grounding Cables in Disconnect Unit 44.5 ft.-lbs. (60 Nm) Requirements: Preparation of the base plate of the Disconnect Unit must be complete (see Section 4.3.2, page 32). The grounding cables must be inserted into the Disconnect Unit through conduits (see Section 9.2.1, page 167), if the cables are not laid in a concrete plate. 38 CoMVPP-SH-US_en-20 System Manual

43 4 Installation Procedure: 1. Disassemble the front panel of the Disconnect Unit (see Section , page 162). 2. Prepare the grounding cables for installation (see Section 9.3, page 168). 3. Connect the grounding cables in the Disconnect Unit with the specified torque in accordance with the circuit diagram. Only use the screws, nuts and washers included in the scope of delivery and make sure that the screw heads always point forwards. 4. Fasten the grounding cables to the cable support rail. This ensures that the cable cannot be pulled out. 4.6 Connecting Grounding Cables in Sunny Central If the MV Power Platform has no Disconnect Units, you must connect the grounding cables to the grounding busbar in the Sunny Central. Figure 20: PE connection area for the connection of grounding cables with terminal lugs Designation A Explanation Copper bars for connecting the grounding cables Requirements: Preparation of the Sunny Central base plate must be complete (see Section 4.3.2, page 32). The grounding cables must be inserted into the Sunny Central through conduits (see Section 9.2.1, page 167), if the cables are not laid in a concrete plate. Procedure: 1. Remove the panels of the Sunny Central (see Section , page 161). 2. Remove the protective covers in the Sunny Central 3. Prepare the grounding cables for installation (see Section 9.3, page 168). 4. Connect the grounding cables in the Sunny Central with the specified torque in accordance with the circuit diagram. Only use the screws, nuts and washers included in the scope of delivery and make sure that the screw heads always point forwards. 5. Fasten the grounding cables to the cable support rail. This ensures that the cable cannot be pulled out. 6. Mount the protective covers to the Sunny Central. 7. Mount the panels of the Sunny Central (see Section , page 161). System Manual CoMVPP-SH-US_en-20 39

44 4 Installation SMA America, LLC 4.7 Installing the AC Connection in the MV Transformer Safety during AC Connection Danger to life due to electric shock High voltage is present on the medium-voltage side. Touching live components results in death or serious injury. All work on the medium-voltage side of the MV transformer is to be carried out by duly authorized persons only. Work on the medium-voltage side is only permitted providing that the medium-voltage side is disconnected by means of an upstream switching device and that this switching device has been secured against reconnection. Always perform work in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA), NEC, NFPA 70E and any locally applicable provisions. Danger to life due to electric shock when live components are touched Adhere to the disconnection procedure specified in the documentation of the MV transformer (see the documentation of the medium-voltage switching device). Do not operate the load-break switch if a fault condition is suspected. Doing so can cause an explosion or fire. Use a hotstick to operate load-break device of the MV transformer. After operating the load-break switch of the MV transformer, check that voltages at transformer terminals are the expected values. Checking voltages verifies that the load-break switch is operated properly and that electrical circuit conditions are as expected. Before servicing transformer secondary connected equipment, verify that no voltage is present at all transformer secondary terminals and ground the transformer secondary terminals following industry accepted safe grounding practices. Grounding secondary terminals protects against situations such as a standby generator energizing transformer from the secondary circuit. Before servicing transformer, always de-energize the transformer from a remote upstream source and then proceed to ground all primary and secondary transformer terminals following industry accepted safe grounding practices. Grounding secondary terminals protects against situations such as a standby generator energizing transformer from the secondary circuit. Follow industry accepted safety practices. Use protective clothing and equipment when working with load-break equipment. Ground the outgoing feeder section. Ensure that no voltage is present Overview of the Connection Area Figure 21: Connection area of the MV transformer 40 CoMVPP-SH-US_en-20 System Manual

45 4 Installation Position of the Deadbreak Bushings The position of the deadbreak bushings can vary depending on the type of MV transformer used. Refer to the MV transformer documentation. Figure 22: Designation of pin connector positions (example) Circuit Diagram Refer to this circuit diagram when connecting the MV transformer to the medium-voltage grid. Figure 23: Circuit diagram (example) System Manual CoMVPP-SH-US_en-20 41

46 4 Installation SMA America, LLC Connecting the AC Cables Lead the AC cables on the medium-voltage side of the MV transformer through the interface gland plates under the MV transformer and connect them to the MV transformer. Requirements: No voltage must be present in the AC cables. Preparation of the interface gland plate of the MV transformer must be complete (see Section , page 34). The AC cables must be routed into the MV transformer through conduits (see Section 9.2.1, page 167). Additional tools required: Hotstick Danger to life due to electric shock by touching live components Disconnect the medium voltage at the transfer station. All work on the MV Power Platform and its devices is permitted only when they are disconnected and free of voltage. Always follow the instruction on the electric arc safety labeling included on the MV Power Platform. When operating the load-break switch, always use a hotstick. Wear suitable personal protective equipment. Authorization for switching the MV transformer Only an authorized person trained in electrical safety and appropriate voltage levels is allowed to connect or disconnect the AC voltage of the MV transformer. To do this, use the medium-voltage switch on the MV transformer on the medium-voltage side. Procedure: 1. Ensure that all devices of the MV Power Platform are voltage-free. 2. Connect the AC cables on the medium-voltage side in accordance with the circuit diagrams included with the MV Power Platform. 4.8 Checking the Cable Connection for Supply Voltage, Communication and Control Systems Overview of the Auxiliary Services Rack The Auxiliary Services Rack is an optional component of the MV Power Platform. The Auxiliary Services Rack is made up of various optional modules. Subject to your specific project, the Auxiliary Services Rack may not include all the modules. The connections for the control system must be executed separately for each inverter. As a result, the inverters can each be switched independently. The control terminals are: Remote shutdown External fast stop External setpoint External insulation monitoring 42 CoMVPP-SH-US_en-20 System Manual

47 4 Installation Figure 24: Overview of all modules of the Auxiliary Services Rack to be connected Position A B C D E F Designation Mounting space for customer-specific box Brown Power Box Inverter Box Pull Box Tracker Box Main Box Installation Sequence Subject to the specific design of your MV Power Platform, the Auxiliary Services Rack may not include all the modules. The installation described here assumes the maximum configuration of the Auxiliary Services Rack. If your MV Power Platform does not include a particular module, you can proceed with the installation of the next module. The sequence of installation work given in this section is recommended by SMA. Recommended procedure: 1. Connect the external supply voltage. 2. Connect the communication. 3. Connect the analog setpoint. 4. Connect the external fast stop. 5. Connect the remote shutdown. 6. Connect the external insulation monitoring. 7. Connect the tracker motors. 8. Connect the supply voltage of the customer-specific box. System Manual CoMVPP-SH-US_en-20 43

48 4 Installation SMA America, LLC Connecting the External Supply Voltage in the Brown Power Box Overview of the Connection Area If the MV Power Platform has been ordered with the option "External supply voltage", an external supply voltage must be provided by the customer. The external supply voltage is connected to the Brown Power Box of the Auxiliary Services Rack. Figure 25: Overview of the connection area for the supply voltage Position A B C Designation Terminal in the Brown Power Box Conduit used Pull Box Cable Requirements The cables used must be copper cables. Maximum cable cross-section: 3 x AWG 2 (35 mm 2 ) Use of bootlace ferrules When installing cables with a cross-section of AWG 10 or smaller, SMA recommends the use of bootlace ferrules. 44 CoMVPP-SH-US_en-20 System Manual

49 4 Installation Inserting and Connecting the Cables Requirements: Preparation of the Pull Box base plate must be complete (see Section 4.3.2, page 32). The cable requirements must be complied with. No voltage must be present on the MV Power Platform. Procedure: 1. Open the Pull Box and the Brown Power Box. 2. Insert the cables through the Pull Box. 3. Insert the cables through the conduits into the Brown Power Box. 4. Connect the cables in the Brown Power Box in accordance with the circuit diagram (see Section 9.4, page 171). 5. Secure the cables using cable ties. 6. Close the Pull Box and the Brown Power Box Connecting the Communication in the Main Box Structure of the Communication Network The communication network of the MV Power Platform enables the parameterization, monitoring and remote diagnosis of the MV Power Platform via computer, as well as power control by the grid operator. The communication network can be set up in ring topology. The various tasks can be organized in two separate networks: Control network: This network is used by the Power Reducer Box or SMA Power Plant Controller to transmit grid management specifications issued by the grid operator to the inverters. The control network is used exclusively for grid management services which are thus transmitted and implemented within the specified time period. If only a low data transfer rate is required for monitoring the PV system, grid operator specifications can also be transmitted via the monitoring network. In this case, only one network is necessary. Monitoring network: this network is used for monitoring, parameterization and remote diagnosis. On the MV Power Platform, there are two optical fiber inputs and two optical fiber outputs. The network is based exclusively on optical fibers. If you integrate the MV Power Platform permanently into a network with Internet access, it will be able to transmit data to Sunny Portal automatically. System Manual CoMVPP-SH-US_en-20 45

50 4 Installation SMA America, LLC Figure 26: Structure of the communication network of a PV system Overview of the Connection Area The MV Power Platform must be connected to the communication network of the PV system. To do this, the data cables must be connected in the Auxiliary Services Rack. The connection between the inverters and the Auxiliary Services Rack has already been installed. Figure 27: Overview of the connection area for the communication connections 46 CoMVPP-SH-US_en-20 System Manual

51 4 Installation Position A B C Designation Splice box in the Main Box Conduit used Pull Box Connecting the Communication in the Main Box Using Optical Fibers Damage to optical fibers due to too tight bend radii Excessive bending or kinking will damage the optical fiber. As a result, signals cannot be transmitted and the communication can fail. Observe the minimum permissible bend radii of the optical fibers. To connect the communication to the MV Power Platform, the optical fibers must be inserted and connected at the splice box located in the Main Box. The splice box is equipped with SC-P plugs to which the optical fibers can be directly connected. There are two ways of connecting the optical fiber to the SC-P plug: Connection of optical fibers via SC plug Connection of optical fibers via optical fiber pigtail Connecting the Optical Fiber with SC Plug Additionally required mounting material (not included in the scope of delivery): Four SC plugs (one plug per optical fiber) Requirements: Preparation of the Pull Box base plate must be complete. No voltage must be present on the MV Power Platform. Procedure: 1. Open the Pull Box and the Main Box. 2. Insert the optical fibers through the Pull Box. 3. Insert the optical fibers into the Main Box through the right-hand conduit. 4. Mount the SC plugs to the optical fibers. 5. Connect the SC plugs to the SC-P plug in the splice box in accordance with the circuit diagram. 6. Secure optical fibers with cable ties. 7. Close the Pull Box and the Main Box. Connecting the Optical Fiber via Pigtail Optical fiber pigtail requirements: The pigtail cable must be equipped with a 50 μm multi-mode optical fiber. The optical fiber pigtail cable must be fitted with an SC plug. Additionally required mounting material (not included in the scope of delivery): Four optical fiber pigtails in accordance with the specifications (one pigtail per optical fiber) System Manual CoMVPP-SH-US_en-20 47

52 4 Installation SMA America, LLC Requirements: Preparation of the Pull Box base plate must be complete. No voltage must be present on the MV Power Platform. Procedure: 1. Open the Pull Box and the Main Box. 1. Insert the optical fibers through the Pull Box. 2. Insert the optical fibers into the Main Box through the right-hand conduit. 3. Splice the optical fibers with the optical fiber pigtails in the splice box. 4. Connect the SC plugs to the SC-P plug in the splice box in accordance with the circuit diagram. 5. Secure optical fibers with cable ties. 6. Close the Pull Box and the Main Box Connecting Analog Setpoints in the Main Box Overview of the Connection Area If grid management is to use the analog setpoints issued by the grid operator, you can connect the analog setpoints in the Auxiliary Services Rack in accordance with the circuit diagram. Figure 28: Overview of the connection area for connection of analog setpoints Position A B C Designation Terminal used in the Main Box Conduit used Pull Box 48 CoMVPP-SH-US_en-20 System Manual

53 4 Installation Cable Requirements The cables used must be shielded against 600 V. Maximum cable cross-section: 2 x AWG 12 (4 mm 2 ) Use of bootlace ferrules When installing cables with a cross-section of AWG 10 or smaller, SMA recommends the use of bootlace ferrules Inserting and Connecting the Cables Requirements: Preparation of the Pull Box base plate must be complete (see Section 4.3.2, page 32). The cable requirements must be complied with. No voltage must be present on the MV Power Platform. Procedure: 1. Open the Pull Box and the Main Box. 2. Insert the cables through the Pull Box. 3. Insert the cables into the Main Box through the conduit. 4. Connect the cables in the Main Box in accordance with the circuit diagram (see Section 9.4, page 171). 5. Secure the cables with the cable tie. 6. Close the Pull Box and the Main Box Connecting the External Fast Stop in the Main Box Overview of the Connection Area If an external fast stop is required, you can connect the external fast stop in the Auxiliary Services Rack in accordance with the circuit diagram. Figure 29: Overview of the connection area for connection of the external fast stop System Manual CoMVPP-SH-US_en-20 49

54 4 Installation SMA America, LLC Position A B C Designation Terminal used in the Main Box Conduit used Pull Box Cable Requirements The cables used must be shielded against 600 V. Maximum cable cross-section: 2 x AWG 12 (4 mm 2 ) Use of bootlace ferrules When installing cables with a cross-section of AWG 10 or smaller, SMA recommends the use of bootlace ferrules Inserting and Connecting the Cables Requirements: Preparation of the Pull Box base plate must be complete (see Section 4.3.2, page 32). The cable requirements must be complied with. No voltage must be present on the MV Power Platform. Procedure: 1. Open the Pull Box and the Main Box. 2. Insert the cables through the Pull Box and secure with cable ties. 3. Insert the cables into the Main Box through the conduit. 4. Connect the cables in the Main Box in accordance with the circuit diagram (see Section 9.4, page 171). 5. Close the Pull Box and the Main Box. 50 CoMVPP-SH-US_en-20 System Manual

55 4 Installation Connecting the Remote Shutdown in the Main Box Overview of the Connection Area The remote shutdown enables the MV Power Platform to be switched off from a distance, e.g., from a control room. The remote shutdown function is similar to the fast stop function of the key switch. Figure 30: Overview of the connection area for connection of the remote shutdown Position A B C Designation Terminal used in the Main Box Conduit used Pull Box Cable Requirements The cables used must be shielded. Maximum cable cross-section: 2 x AWG 12 (4 mm 2 ) Use of bootlace ferrules When installing cables with a cross-section of AWG 10 or smaller, SMA recommends the use of bootlace ferrules Inserting and Connecting the Cables Requirements: Preparation of the Pull Box base plate must be complete (see Section 4.3.2, page 32). The cable requirements must be complied with. No voltage must be present on the MV Power Platform. System Manual CoMVPP-SH-US_en-20 51

56 4 Installation SMA America, LLC Procedure: 1. Open the Pull Box and the Main Box. 2. Insert the cables through the Pull Box and secure with cable ties. 3. Insert the cables into the Main Box through the conduits. 4. Connect the cables in the Main Box in accordance with the circuit diagram (see Section 9.4, page 171). 5. Attach the cables to the cable support rail using cable ties. This ensures that the cable cannot be pulled out. 6. Close the Pull Box and the Main Box Connecting the Insulation Monitoring in the Main Box Overview of the Connection Area The optional insulation measuring device emits a warning if the PV field does not have sufficient insulation resistance. This warning signal can be tapped via a potential-free relay contact (changeover contact). Figure 31: Overview of the connection area for connection of the external insulation monitoring Position A B C Designation Terminal used in the Main Box Conduit used Pull Box Cable Requirements The cables used must be shielded. Maximum cable cross-section: 2 x AWG 8 (10 mm 2 ) Use of bootlace ferrules When installing cables with a cross-section of AWG 10 or smaller, SMA recommends the use of bootlace ferrules. 52 CoMVPP-SH-US_en-20 System Manual

57 4 Installation Inserting and Connecting the Cables Requirements: Preparation of the Pull Box base plate must be complete (see Section 4.3.2, page 32). The cable requirements must be complied with. No voltage must be present on the MV Power Platform. Procedure: 1. Open the Pull Box and the Main Box. 2. Insert the cables through the Pull Box and secure with cable ties. 3. Insert the cables into the Main Box through the conduits. 4. Connect the cables in the Main Box in accordance with the circuit diagram (see Section 9.4, page 171). 5. Close the Pull Box and the Main Box Connecting the Tracker Motors in the Tracker Box Overview of the Connection Area You can connect the cables of the tracker motors in the Tracker Box. PV modules with tracking function are typically driven by tracker motor. Figure 32: Overview of the connection area for connection of the Tracker Box Position A B C Designation Terminal used in the Tracker Box Conduit used Pull Box System Manual CoMVPP-SH-US_en-20 53

58 4 Installation SMA America, LLC Cable Requirements The cables used must be copper cables. Maximum cable cross-section: each AWG 8 (10 mm 2 ), 3-wire Use of bootlace ferrules When installing cables with a cross-section of AWG 10 or smaller, SMA recommends the use of bootlace ferrules Inserting and Connecting the Cables Requirements: Preparation of the Pull Box base plate must be complete (see Section 4.3.2, page 32). The cable requirements must be complied with. No voltage must be present on the MV Power Platform. Procedure: 1. Open the Pull Box and the Tracker Box. 2. Insert the cables through the Pull Box and secure with cable ties. 3. Insert the cables into the Tracker Box through the conduit. 4. Connect the cables in the Tracker Box according to the circuit diagram(see Section 9.4, page 171). 5. Close the Pull Box and the Tracker Box Connecting a Customer-Specific Box Overview of the Connection Area In the customer-specific box, it is possible to connect devices installed by the customer. When connecting a customer-specific box, the connection conditions and cable requirements of these devices must be taken into account. The box and the devices installed must be supplied by the customer. Figure 33: Overview of the connection area for connection of the customer-specific box 54 CoMVPP-SH-US_en-20 System Manual

59 4 Installation Position A B C D Designation Mounting space for customer-specific box Conduits used Pull Box Terminal for connecting the supply voltage of the customer-specific box Inserting and Connecting the Cables Requirements: Preparation of the Pull Box base plate must be complete (see Section 4.3.2, page 32). The cable requirements of the devices to be connected must be complied with. No voltage must be present on the MV Power Platform. Procedure: 1. Open the Pull Box and the customer-specific box. 2. Insert the cables through the Pull Box and secure with cable ties. 3. Insert the cables into the customer-specific box through the conduits. 4. Connect the cables in the customer-specific box in accordance with the customer's circuit diagram. 5. If necessary, connect the supply voltage for the customer-specific box in the Main Box. 6. Close the Pull Box and the customer-specific box. System Manual CoMVPP-SH-US_en-20 55

60 4 Installation SMA America, LLC 4.9 Installing the DC Connection Safety during DC Connection Danger to life from electric shock due to live voltage There are high voltages present in the MV Power Platform and its devices. Touching live components results in death or serious injury. Never remove the protective covers while the devices are live. Whenever possible, work only on disconnected equipment, following the disconnection procedures outlined in this manual, and OSHA compliant lockout-tagout procedures. If troubleshooting, commissioning, or maintenance requires working on the live devices, carefully follow all safety precautions and procedures for live working described in this manual, as well as OSHA compliant work permitting processes. Only trained, qualified persons are allowed to work on the MV Power Platform and its components. After disconnecting the MV Power Platform, wait at least 15 minutes until the inverter capacitors have discharged completely. Prior to performing any work on the MV Power Platform and its devices, ensure that no voltage is present. Do not touch any live components in the inverter or the medium-voltage grid. When carrying out any work on the MV Power Platform, wear Hazard Risk Category 2 personal protective equipment. Follow the instructions precisely. Observe the safety messages. Danger to life from electric shock due to live DC cables DC cables connected to PV modules that are exposed to sunlight are live. Trying to connect live DC cables will result in death or serious injury. Prior to connecting the DC cables to the inverter, make sure that the DC cables are voltage-free. When carrying out any work on the MV Power Platform, wear Hazard Risk Category 2 personal protective equipment. Risk of fire due to faulty connection of the DC cables When connecting the DC cables in the Disconnect Unit, the terminal lugs must not be connected vertically to the connection lugs of the ungrounded terminal, otherwise the DC cables could overheat and catch fire. Connect the terminal lugs to the ungrounded terminal with the maximum possible angle, so that the DC cables are routed towards the side panels. Ensure that live bolted connections are always executed with the exact torque specified in this document. Only use suitable tools when working on the device. 56 CoMVPP-SH-US_en-20 System Manual

61 4 Installation Risk of burns due to hot components The components of the Sunny Central can get very hot. Touching these components can result in burns. Do not touch hot components. Wait until hot components have sufficiently cooled down. Observe the safety messages in the Sunny Central. When carrying out any work on the MV Power Platform, always wear suitable personal protective equipment. Damage to electronic components due to electrostatic discharge Electrostatic discharge can damage or destroy electronic components. Observe the ESD safety regulations when working on the device. When carrying out any work on the MV Power Platform, always wear suitable personal protective equipment. Neutralize any electrostatic charge before touching electronic components, for example, by touching the grounding connection of the doors Cable Requirements In addition to the general cable requirements (see Section , page 271), the following requirements are applicable: Take the different DC cable lengths into account Due to the differing positions of the DC cable terminals in Disconnect Unit 1 / Sunny Central 1 and Disconnect Unit 2 / Sunny Central 2, the lengths of the DC cables need to be adjusted accordingly. Takes these differences into account for estimating the DC cable lengths. Cables: Wire sizing in accordance to the National Electric Code Terminal lugs: Only connect a maximum of two cables to the connecting lugs or connection points of the DC busbars. Information on torques The torques listed in the table below define the torques with which the terminal lugs are mounted to the copper bar. Connection option Cable cross-section Torque Cable connection with aluminum terminal lugs 4 AWG to 800 kcmil 27.5 ft.-lbs. (37 Nm) (25 mm 2 to 405 mm 2 ) Cable connection with copper terminal lugs 4 AWG to 800 kcmil (25 mm 2 to 405 mm 2 ) 44.5 ft.-lbs. (60 Nm) System Manual CoMVPP-SH-US_en-20 57

62 4 Installation SMA America, LLC Connecting the DC Cables in the Disconnect Units Overview of the Connection Area The connection areas in Disconnect Unit 1 and Disconnect Unit 2 are designed differently. Figure 34: DC connections in the Disconnect Units Position Designation A DC input for the grounded terminal of Disconnect Unit 1 B DC input for the ungrounded terminal of Disconnect Unit 1 C DC input for the ungrounded terminal of Disconnect Unit 2 D DC input for the grounded terminal of Disconnect Unit 2 58 CoMVPP-SH-US_en-20 System Manual

63 4 Installation Connecting the DC Cables in Disconnect Unit 1 Requirements: Preparation of the base plate of Disconnect Unit 1 must be complete (see Section 4.3.2, page 32). The DC cables must be routed into Disconnect Unit 1 through conduits (see Section 9.2.1, page 167). The cable requirements must be complied with (see Section 4.9.2, page 57). No voltage must be present on the MV Power Platform. Procedure: 1. Remove the front panel of Disconnect Unit 1 (see Section , page 162). 2. Prepare the DC cables for installation (see Section 9.3, page 168). 3. Connect the DC cables of the ungrounded terminal in Disconnect Unit 1 in accordance with the circuit diagram and with the prescribed torque. Ensure that the terminal lugs are connected to the connection lugs with the maximum possible angle. Only use the screws, nuts and washers included in the scope of delivery and make sure that the screw heads always point forwards. 4. Remove the protective covers from the connection busbars of the grounded terminal (see Section 9.1.1, page 159). 5. Connect the DC cables of the grounded terminal in Disconnect Unit 1 in accordance with the circuit diagram and with the prescribed torque. Only use the screws, nuts and washers included in the scope of delivery and make sure that the screw heads always point forwards. 6. Secure the DC cables of the grounded terminal on the cable support rail. This ensures that the cable cannot be pulled out. 7. Mount the protective covers on the connection bars of the grounded terminal. 8. Secure the DC cables on the cable support rail. This ensures that the cable cannot be pulled out Connecting the DC Cables in Disconnect Unit 2 Requirements: Preparation of the base plate of Disconnect Unit 2 must be complete (see Section 4.3.2, page 32). The DC cables must be routed into Disconnect Unit 2 through conduits (see Section 9.2.1, page 167). The cable requirements must be complied with (see Section 4.9.2, page 57). No voltage must be present on the MV Power Platform. System Manual CoMVPP-SH-US_en-20 59

64 4 Installation SMA America, LLC Procedure: 1. Remove the front panel of Disconnect Unit 2 (see Section , page 162). 2. Prepare the DC cables for installation (see Section 9.3, page 168). 3. Remove the protective covers from the connection busbars of the grounded terminal (see Section 9.1.1, page 159). 4. Connect the DC cables of the grounded terminal in Disconnect Unit 2 in accordance with the circuit diagram and with the prescribed torque. Only use the screws, nuts and washers included in the scope of delivery and make sure that the screw heads always point forwards. 5. Connect the DC cables of the ungrounded terminal in Disconnect Unit 2 in accordance with the circuit diagram and with the prescribed torque. Ensure that the terminal lugs are connected to the connection lugs with the maximum possible angle. Only use the screws, nuts and washers included in the scope of delivery and make sure that the screw heads always point forwards. 6. Secure the DC cables of the grounded terminal on the cable support rail. This ensures that the cable cannot be pulled out. 7. Mount the protective covers on the connection bars of the grounded terminal Connecting the DC Cables to the Sunny Central If the MV Power Platform is not equipped with Disconnect Units, connect the DC cables in the Sunny Central. Figure 35: DC terminals in the Sunny Central Position Positive grounding Negative grounding Without grounding A DC+ terminal DC terminal DC terminal B DC terminal DC+ terminal DC+ terminal 60 CoMVPP-SH-US_en-20 System Manual

65 4 Installation Requirements: Preparation of the Sunny Central base plate must be complete (see Section 4.3.2, page 32). The DC cables must be routed into Sunny Central through conduits (see Section 9.2.1, page 167). The cable requirements must be complied with (see Section 4.9.2, page 57). No voltage must be present on the MV Power Platform. Procedure: 1. Prepare the DC cables for installation (see Section 9.3, page 168). 2. Remove the panels of the Sunny Central (see Section , page 161). 3. Remove the protective covers from the connection busbars of the grounded terminal (see Section 9.1.1, page 159). 4. Connect the DC cables with the specified torque in accordance with the circuit diagram. Only use the screws, nuts and washers included in the scope of delivery and make sure that the screw heads always point forwards. 5. Secure the DC cables on the cable support rail. This ensures that the cable cannot be pulled out. 6. Mount the panels of the Sunny Central (see Section , page 161) Final Installation Work Sealing the Base Plates Once installation work is completed, the base plates must be sealed. This protects the MV Power Platform from moisture. Additionally required mounting material (not included in the scope of delivery): Suitable material for sealing the base plates (e.g. expanding foam) Procedure: Seal the base plates of the MV Power Platform Mounting the Panels When all installation work is complete, or if protracted interruptions are anticipated during installation, the panels on the devices must be closed. Procedure: 1. Mount the front panels on the Disconnect Units (see Section , page 164). 2. If applicable, mount the panels of the inverters (see Section , page 161). System Manual CoMVPP-SH-US_en-20 61

66 5 Disconnecting and Reconnecting SMA America, LLC 5 Disconnecting and Reconnecting 5.1 Safety When Disconnecting and Reconnecting Danger to life from electric shock due to live voltage There are high voltages present in the MV Power Platform and its components. Touching live components results in death or serious injury due to electric shock. When working in a high contact-risk environment, wear Hazard Risk Category 2 personal protective equipment. Always perform work in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA), NEC, and NFPA 70E. Do not touch live components. Follow the instructions precisely. Observe the safety warnings on the devices and in the documentation. Ensure that no disconnected components can be reconnected. After disconnecting the MV Power Platform, wait at least 15 minutes until the inverter capacitors have discharged completely. Before performing any work on the MV Power Platform, ensure that no voltage is present in any of the components. Risk of burns due to hot devices or components Some devices or components on the MV Power Platform can reach high temperatures during operation. Touching these components can result in burn injuries. Observe the safety warnings on the devices and in the documentation. During operation, do not touch any devices or components marked with such warnings. After disconnecting the PV system, wait until any hot components or devices, e.g., the MV transformer, have cooled down sufficiently. Hazard Risk Category 2 protective equipment required In accordance with NFPA 70E, an arc flash hazard risk analysis has been performed by SMA, and appropriate Arc Flash Hazard labels stating the required Personal Protective Equipment (PPE) for exposed, energized interaction with the equipment, are installed. Hazard Risk Category 2 PPE is the requirement for all routine maintenance, diagnostics, and commissioning activities as described in the SMA protocols. Areas within the machine also exist that cannot, under any circumstances, be exposed while energized. These areas are marked accordingly on the machine, and can only be made accessible after de-energization of the inverter. For additional information, please contact the SMA Service Line. Authorization for switching the MV Transformer Only a duly authorized person trained in electrical safety is allowed to connect or disconnect the AC voltage of the medium-voltage transformer. Use the load-break switch on the left-hand exterior panel of the MV transformer. 62 CoMVPP-SH-US_en-20 System Manual

67 5 Disconnecting and Reconnecting 5.2 System and Equipment Disconnecting Means Overview of System Disconnecting Means - Power Circuit Figure 36: Connection point overview of the power connections Position Designation 1 String-Combiner Boxes 2 DC Disconnect (external or internal) 3 Inverters 4 MV Transformer 5 Substation A Combiner box for disconnecting means B DC load-break switch C AC Disconnect D Medium-voltage load-break switch E Substation disconnecting means/switchgear Overview of System Disconnecting Means - Supply Voltage In the following section three different views of the supply voltage connection points are shown. Select the appropriate overview for the configuration of your device. System Manual CoMVPP-SH-US_en-20 63

68 5 Disconnecting and Reconnecting SMA America, LLC Internal Supply Voltage Figure 37: Overview of the connection points for internal voltage supply via the Auxiliary Services Rack Position Designation 1 Main Box 2 Tracker Box* A Main switch of the Main Box B Main switch of the Tracker Box* *Optional External Supply Voltage Figure 38: Overview of the connection points for external voltage supply via the Auxiliary Services Rack Position Designation 1 Distribution* 2 Brown Power Box 3 Main Box 4 Tracker Box** 64 CoMVPP-SH-US_en-20 System Manual

69 5 Disconnecting and Reconnecting Position 5 Inverter Box** A Low-voltage distribution disconnecting means B Main switch of the Brown Power Box C Main switch of the Main Box D Main switch of the Tracker Box** E Main switch of the Inverter Box** 5.3 Disconnecting the Compact MV Power Platform Switching off the Inverters 1. Turn the key switches on the inverters to Stop. 2. Remove the keys. It is recommended that the keys are kept in the possession of the technician Disconnecting the DC Side For Platforms with External DC Disconnects Additionally required material: Five lockout devices. Diameter of the shackle: 0.2 in. to 0.3 in. (5 mm to 8 mm) Requirement: The inverter is switched off(see Section 5.3.1, page 65). Procedure: Designation * Not included in the scope of delivery ** Optional 1. Operate the switch levers of the Disconnect Units: Switch all switch levers to the left to the OFF position. System Manual CoMVPP-SH-US_en-20 65

70 5 Disconnecting and Reconnecting SMA America, LLC Pull the lock brackets out of the switch levers. Hook the lockout devices in the lock brackets and lock them. This will ensure that the switch levers cannot reconnect inadvertently. 2. Ensure that no voltage is present on the load side of the DC switches. 3. Cover or shield any adjacent live components For Platforms with Internal DC Switch Additionally required material: Two lockout devices. Diameter of the shackle: 0.2 in. to 0.3 in. (5 mm to 8 mm) Requirement: The inverter is switched off(see Section 5.3.1, page 65).lockout device Procedure: 1. Operate the DC Switch on the front door of each inverter: Turn both switches to the OFF position. The red light repeater lights up. 66 CoMVPP-SH-US_en-20 System Manual

71 5 Disconnecting and Reconnecting 2. Secure the DC Switch on the inverter door against accidental reconnection using a lockout device. 3. Wait 15 minutes until the Sunny Central capacitors have discharged completely. 4. If necessary, disconnect the DC voltage in the combiner boxes, lock-out and tag-out Disconnecting the AC Side Danger to life due to electric shock when live components are touched Adhere to the disconnection procedure specified in the documentation of the medium-voltage switching device (see medium-voltage switching device documentation). Strictly follow all safety signs, labels or instructions present. Do not operate load-break switches if a fault condition is suspected. Doing so can cause an explosion or fire. Use a hotstick to operate the MV transformer load-break equipment. After operating the load-break equipment of the MV transformer, check that voltages at the transformer terminals are the expected values. Checking voltages verifies that load-break equipment is operated properly and that electrical circuit conditions are as expected. Before servicing transformer secondary connected equipment, ensure that no voltage is present at any of the transformer secondary terminals and ground the transformer secondary terminals in accordance with the locally applicable standards and guidelines. Grounding secondary terminals protects against situations such as a standby generator energizing an MV transformer from the secondary circuit. Before servicing the MV transformer, always disconnect the transformer from a remote upstream source and then proceed to ground all primary and secondary transformer terminals in accordance with the locally applicable standards and guidelines. Grounding secondary terminals protects against situations such as a standby generator energizing the transformer from the secondary circuit. Follow industry accepted safety practices. Utilize protective clothing and equipment when working with load-break equipment. Ground the outgoing feeder section. Ensure that no voltage is present. When switching at low temperatures, the two-position load-break switch may not work properly. Components that are supposedly disconnected, may be live. Three-phase padmounted transformers use R-Temp or Envirotemp FR3n for an transformer oil. When the transformer oil temperature is less than 0 C (32 F) for R-Temp or less than -10 C (14 F) for Envirotemp FR3, viscosity is reduced, which may reduce make and break capabilities of load-break devices. Below these temperatures, under-oil load-break accessories should not be used to make or break a load. Instead, disconnect the MV transformer from a remote upstream source before operating under-oil load-break switches. It is recommended that remote disconnection be used whenever possible. Operate load-break switches using a hotstick. After the load-break switch is switched to the OPEN position, ensure that no voltage is present at the transformer secondary terminals and then ground the secondary terminals to prevent transformer backfeed energization. Additionally required material: Three lockout devices. Diameter of the shackle: 0.2 in. to 0.3 in. (5 mm to 8 mm) Requirement: The inverter is switched off(see Section 5.3.1, page 65). System Manual CoMVPP-SH-US_en-20 67

72 5 Disconnecting and Reconnecting SMA America, LLC Procedure: 1. Switch the two-position medium-voltage load-break switch to the position OPEN. 2. Lock and tag out the switch in accordance with the LOTO procedures established by the PV system owner/operator. Hook the lockout devices in the lock brackets and lock them. This will ensure that the two-position medium-voltage load-break switch cannot reconnect inadvertently. 3. Switch off the AC Disconnect in Sunny Central CP US inverters with integrated AC Disconnect. Press the Push OFF button on the AC Disconnect. Flip up the cover of the AC Disconnect. Hook the lockout device in the cover of the AC Disconnect and lock it. This will ensure that the AC Disconnect cannot reconnect inadvertently. 68 CoMVPP-SH-US_en-20 System Manual

73 5 Disconnecting and Reconnecting Disconnecting the Supply Voltage Source For Platforms Configured for Internal Supply Figure 39: Connection points on the Auxiliary Services Rack Position A B Designation Tracker Box* Main Box *Optional Additionally required material: If the Auxiliary Services Rack is used, four lockout devices are required. Diameter of the shackle: 0.2 in. to 0.3 in. (5 mm to 8 mm) Requirement: The inverter is switched off(see Section 5.3.1, page 65). System Manual CoMVPP-SH-US_en-20 69

74 5 Disconnecting and Reconnecting SMA America, LLC Procedure: 1. For the Auxiliary Services Rack, the following switches have to be actuated: Move the main switch of the Main Box to the OFF position. Move the main switch of the Tracker Box to the OFF position. Pull the lock brackets out of the main switches. Hook the lockout devices in the lock brackets and lock them. This will ensure that the main switch cannot reconnect inadvertently. 2. For both inverters, the following switches have to be actuated: Position of the circuit breaker in the Sunny Central CP-US: 3. Ensure that all poles in each device are free of voltage. 70 CoMVPP-SH-US_en-20 System Manual

75 5 Disconnecting and Reconnecting 4. Cover or shield any adjacent live components For Platforms Configured for External Supply Figure 40: Connection points on the Auxiliary Services Rack Position A B C D Designation Inverter Box Brown Power Box Main Box Tracker Box* *Optional Additionally required material: If the Auxiliary Services Rack is used, four lockout devices are required. Diameter of the shackle: 0.2 in. to 0.3 in. (5 mm to 8 mm) Requirement: The inverter is switched off(see Section 5.3.1, page 65). Procedure: 1. Switch off the supply voltage disconnecting means and lock out. 2. For the Auxiliary Services Rack, the following switches have to be actuated: Switch the main switch of the Brown Power Box to the OFF position and lock it. System Manual CoMVPP-SH-US_en-20 71

76 5 Disconnecting and Reconnecting SMA America, LLC 5.4 Reconnecting the MV Power Platform Reconnecting the Supply Voltage Source For Platforms Configured for Internal Supply 1. Switch on the circuit breakers of the supply voltage in the inverters. 2. For the Auxiliary Services Rack, all switches have to be actuated: Unlock the lockout devices and remove them from the lock brackets. Push the lock brackets towards the main switch. The lock brackets must line up with the main switches. Move the main switch of the Main Box to the ON position. If a Tracker Box is connected, switch the main switch of the Tracker Box to the ON position For Platforms Configured for External Supply 1. If no Auxiliary Services Rack is used, switch on the circuit breakers of the supply voltage in the inverters. 2. In addition, all switches have to be actuated for the Auxiliary Services Rack: Unlock the lockout devices and remove them from the lock brackets. Push the lock brackets towards the main switch. The lock brackets must line up with the main switches. In case of external supply voltage, switch the main switch of the Brown Power Box to the ON position. 3. Switch on the external supply voltage disconnecting means. 72 CoMVPP-SH-US_en-20 System Manual

77 5 Disconnecting and Reconnecting Reconnecting the AC Source Danger to life due to electric shock when live components are touched Adhere to the disconnection procedure specified in the documentation of the medium-voltage switching device (see medium-voltage switching device documentation). Strictly follow all safety signs, labels or instructions present. Do not operate load-break switches if a fault condition is suspected. Doing so can cause an explosion or fire. Use a hotstick to operate the MV transformer load-break equipment. After operating the load-break equipment of the MV transformer, check that voltages at the transformer terminals are the expected values. Checking voltages verifies that load-break equipment is operated properly and that electrical circuit conditions are as expected. Before servicing transformer secondary connected equipment, ensure that no voltage is present at any of the transformer secondary terminals and ground the transformer secondary terminals in accordance with the locally applicable standards and guidelines. Grounding secondary terminals protects against situations such as a standby generator energizing an MV transformer from the secondary circuit. Before servicing the MV transformer, always disconnect the transformer from a remote upstream source and then proceed to ground all primary and secondary transformer terminals in accordance with the locally applicable standards and guidelines. Grounding secondary terminals protects against situations such as a standby generator energizing the transformer from the secondary circuit. Follow industry accepted safety practices. Utilize protective clothing and equipment when working with load-break equipment. Ground the outgoing feeder section. Ensure that no voltage is present. When switching at low temperatures, the two-position load-break switch does not work properly. Components that are supposedly disconnected, may be live. Three-phase padmounted transformers use R-Temp or Envirotemp FR3n for an transformer oil. When the transformer oil temperature is less than 0 C (32 F) for R-Temp or less than -10 C (14 F) for Envirotemp FR3, viscosity is reduced, which may reduce make and break capabilities of load-break devices. Below these temperatures, under-oil load-break accessories should not be used to make or break a load. Instead, de-energize the transformer from a remote upstream source before operating under-oil load-break devices. It is recommended that remote disconnection be used whenever possible. Operate load-break switches using a hotstick. After the load-break switch is switched to the OPEN position, ensure that no voltage is present at the transformer secondary terminals and then ground the secondary terminals to prevent transformer backfeed energization. Procedure: 1. Switch on the AC Disconnect in Sunny Central CP-US inverters with integrated AC Disconnect. Open the lockout device and remove it. Flip down the cover. Press the Push ON button. 2. Unlock the lockout devices and remove them from the two-position medium-voltage load-break switch. 3. Switch the two-position medium-voltage load-break switch to position CLOSE. System Manual CoMVPP-SH-US_en-20 73

78 5 Disconnecting and Reconnecting SMA America, LLC Reconnecting the DC Sources For Platforms with External DC Disconnects Operate the switch levers of the Disconnect Units: Unlock the lockout devices and remove them from the lock brackets. Push the lock brackets towards the switch levers. The lock brackets must line up with the switch levers. Switch all switch levers to the right to the ON position For Platforms with Internal DC Switches Operate the DC Switches on the door of each inverter: Unlock the lockout devices and remove them from the lock brackets. Switch the DC Switch on the inverter door to ON Restarting the Inverters Turn the key switches on the inverters to Start. 5.5 System Disconnection Disconnecting the Inverter 1. Turn the key switches on the inverters to Stop. 2. Remove the keys. It is recommended that the keys are kept in the possession of the technician. 3. Operate and lock-out the external or internal DC Disconnect switches (see Section 5.3.2, page 65). 4. Danger to life due to electric shock when live components are touched Operate and lock out the inverter AC circuit breaker (see Section 5.3.3, page 67). 5. Operate and lock out the inverter supply voltage circuit breaker. 74 CoMVPP-SH-US_en-20 System Manual

79 5 Disconnecting and Reconnecting Position of the circuit breaker in the Sunny Central CP-US: System Manual CoMVPP-SH-US_en-20 75

80 5 Disconnecting and Reconnecting SMA America, LLC Disconnecting Both Inverters 1. Turn the key switches on the inverters to Stop. 2. Remove the keys. It is recommended that the keys are kept in the possession of the technician. 3. Operate and lock the external or internal DC Disconnect switches (see Section 5.3.2, page 65). 4. Danger to life due to electric shock when live components are touched Operate and lock the AC circuit breaker of both inverters (see Section 5.3.3, page 67). 5. If the platform is configured with an Auxiliary Services Rack, the following switches have to be actuated: Move the main switch of the Main Box to the OFF position. Pull the lock brackets out of the main switches. Hook the lockout devices in the lock brackets and lock them. This will ensure that the main switch cannot reconnect inadvertently. 76 CoMVPP-SH-US_en-20 System Manual

81 5 Disconnecting and Reconnecting Disconnecting the Medium-Voltage Transformer 1. Turn the key switches on the inverters to Stop. 2. Remove the keys. It is recommended that the keys are kept in the possession of the technician. 3. Danger to life due to electric shock when live components are touched Operate and lock the AC circuit breaker of both inverters (see Section 5.3.3, page 67). Operate and lock the load break switch of the Medium Voltage Transformer (see Section 5.3.3, page 67) Disconnecting the Tracker Motor Circuits 1. Move the main switch of the Tracker Box to the OFF position. Pull the lock brackets out of the main switches. Hook the lockout devices in the lock brackets and lock them. This will ensure that the main switch cannot reconnect inadvertently. 2. Ensure no external generator feed is connected to the included generator inlet receptacle. System Manual CoMVPP-SH-US_en-20 77

82 5 Disconnecting and Reconnecting SMA America, LLC Disconnecting the 120V Auxiliary Circuits of the Platform Disconnect the voltage supply for the customized Box and the outlets for the main switch of the Main Box. 1. Move the main switch of the Main Box to the OFF position. Pull the lock brackets out of the main switches. Hook the lockout devices in the lock brackets and lock them. This will ensure that the main switch cannot reconnect inadvertently. 78 CoMVPP-SH-US_en-20 System Manual

83 6 Operation 6 Operation This section describes the main operating elements of the devices of the MV Power Platform such as the switches, the touch display and the user interface. It also describes how to configure the system and network settings, how to switch the insulation monitoring and which parameters are important for the safe operation of the inverter. This section has no mandatory sequence of actions. 6.1 System Settings via Touch Display Selecting the Language 1. Select. 2. Select. 3. Select the language based on the country symbols. 4. Confirm entry by selecting Setting the Date, Time and Time Zone SC-COM accepts changes The SC-COM will accept date, time or time zone changes made on the display. 1. Select. 2. Select. 3. To change the date, select the day, month and year in the field. Use the and buttons to change the day, month and year. 4. To change the time, select the hour, minute and second one after another in the field. Use and to change the hours, minutes and seconds. 5. To change the time zone, select a time zone in the field. Use the and buttons to change the time zone Selecting the Display Format of the Touch Display 1. Select. 2. Select. 3. Select the date format. 4. Select the hour format. 5. Select the number format. 6. Confirm entry by selecting Setting the Brightness of the Touch Display 1. Select. 2. Select. 3. Set the display brightness. Select for a darker screen or for a lighter screen. 4. Confirm entry by selecting. System Manual CoMVPP-SH-US_en-20 79

84 6 Operation SMA America, LLC 6.2 Changing the System Settings via the User Interface Setting the Language You can also set the language of the user interface via the XML file custom.xml (see Section 6.2.6, page 81). Procedure: 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Settings > System. 3. Select the desired language in the Language field. 4. Select [Save]. 5. To log off from the user interface, select [Logout] Setting the Date, Time and Time Zone 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Settings > System. 3. Select [Change] in the Time zone (UTC offset) field. 4. Select the correct time zone in the Time zone (UTC offset) drop-down list. 5. Select an option in the Automatic change from summer time to winter time field: Option yes no Explanation Automatic change from daylight saving time to standard time is active. Automatic change from daylight saving time to standard time is not active. Date and time have to be set manually. 6. Enter the current date in the New date field. 7. Enter the current time in the New time field. 8. Select [Save]. 9. To log off from the user interface, select [Logout] Entering the Operator Name 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Settings > System. 3. Enter the operator name in the Operator name field. 4. Select [Save]. 5. To log off from the user interface, select [Logout]. 80 CoMVPP-SH-US_en-20 System Manual

85 6 Operation Resetting the SC-COM Resetting the SC-COM will restore all of its original default settings. If you have uploaded an XML file custom.xml, the settings of this file are copied (see Section 6.2.6, page 81). Backing up data Before you reset the SC-COM, note down all settings such as network or portal settings. To avoid data loss, be sure to back up your PV system data. PV system identifier in Sunny Portal If you reset the SC-COM settings, the SC-COM will delete all login settings for Sunny Portal. If you restart the SC-COM after reset without changing any settings, the SC-COM will create a new PV system profile with a new system identifier in Sunny Portal. If the SC-COM is configured to send data to the existing PV system in Sunny Portal, adjust the identifier of the existing PV system (see Section , page 91). Enter the address of a user who has Sunny Portal administrator rights for the PV system. Procedure: 1. Log into the user interface as an installer (see Section 9.5.1, page 173). 2. Select Sunny Central > Info. 3. Select [Default setting]. A window containing a security question opens. 4. Select [Confirm]. 5. To log off from the user interface, select [Logout] Changing the Password for the User Groups The SC-COM differentiates between the user groups "user" and "installer" (for information on user rights, see Section 12.3, page 271). To change the password for the "installer" user group, you must be logged in as an installer. To change the password for the "user" user group, you can be logged in as a user or an installer. Identical passwords for the user groups If your "User" password is the same as your "Installer" password, you will automatically be logged in as an installer. While you enter your password, the user interface displays information on the security level of the password entered. The SC-COM categorizes passwords as very unsafe, unsafe, adequate, safe and very safe. Only select passwords with a security quality level that is at least safe. You can also change the password of the "installer" user group via the XML file custom.xml (see Section 6.2.6, page 81). Procedure: 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Settings > Security. 3. Enter a secure password in the User password or Installer password fields and confirm it in the second field. 4. Select [Save]. 5. To log off from the user interface, select [Logout] Customized Settings via XML File This section describes how to configure the system and network settings using an XML file custom.xml. To enable the settings, the SC-COM must be reset to the default settings. This action is optional. Most settings can also be configured via the user interface. System Manual CoMVPP-SH-US_en-20 81

86 6 Operation SMA America, LLC Uploading the custom.xml File If you upload the custom.xml file to the user interface, the SC-COM checks the file to ensure that the values entered are valid and accurate, and copies the settings when the SC-COM is next reset. Correct network settings While uploading, the SC-COM checks the XML file custom.xml for validity and accuracy of the entered values. It is not checked whether the settings for the network are correct. Ensure that the custom.xml file includes the correct network settings. Procedure: 1. Create the custom.xml file with the required settings (see Section 6.2.7, page 83). 2. Log into the user interface as an installer (see Section 9.5.1, page 173). 3. Select Sunny Central > Settings > System. 4. Select [Browse] in the Upload settings (custom.xml) field. 5. Double-click on the custom.xml file in the open dialog box. 6. Select [Upload]. The message "Do you really want to copy the customer-specific settings?" is displayed. The message "The settings were not copied as the file has an invalid format or invalid entries." is displayed? Click on the symbol. Read off the error in the open dialog box and correct the custom.xml file. Ensure that the custom.xml file is valid and correct. 7. Select [Confirm]. The message "The settings were successfully saved" is displayed. The settings will become effective by carrying out a reset to default settings." 8. To enable the settings in the custom.xml file, reset the SC-COM to the default settings (see Section 6.2.4, page 81). 9. To log off from the user interface, select [Logout] Downloading the XML File custom.xml The file custom.xml that you uploaded can also be downloaded. Procedure: 1. Log into the user interface as an installer (see Section 9.5.1, page 173). 2. Select Sunny Central > Settings > System. 3. Click on the custom.xml link in the Upload settings (custom.xml) field. 4. Choose a storage location for the file and save it. 5. To log off from the user interface, select [Logout]. 82 CoMVPP-SH-US_en-20 System Manual

87 6 Operation Deleting the custom.xml File You can delete the custom.xml file via the user interface. If you have made your personal settings effective via the custom.xml file before deleting it, these settings remain effective. No confirmation after deleting the custom.xml file If you perform the following steps, the SC-COM deletes the custom.xml file immediately without displaying the dialog window for confirmation. Save the custom.xml file before you delete the file. Procedure: 1. Log into the user interface as an installer (see Section 9.5.1, page 173). 2. Select Sunny Central > Settings > System. 3. In the Upload settings (custom.xml) field, select the [Delete] button. The custom.xml file is immediately deleted. 4. To log off from the user interface, select [Logout] XML File for Customer-Specific Settings Structure of the XML File custom.xml So that the SC-COM can correctly read the settings from the XML file, the file has to be written correctly. Elements of the XML file <?xml version="1.0" encoding="utf-8" standalone="yes"?> <WebBox xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" xmlns:xsi=" XMLSchema-instance" xsi:nonamespaceschemalocation="config_100.xsd"> <Info> <Version>my config V1.01</Version> </Info> <Config> <Key>NetworkSettings_DhcpUsage1</Key> <Value>False</Value> </Config> <Loader> <Settings> <PowerFail>2500</PowerFail> </Settings> </Loader> Explanation Required element of the XML file Required element of the XML file Is finished with the tag </WebBox> at the end of the XML file Required element of the XML file You have to enter the name and the version for your settings between the version tags. This information is displayed in the header of the user interface. Here, you can set the parameters and your values (see Section , page 84). You can set the period in ms that determines the shut-down time of the SC-COM after the SC-COM has received the signal of the inverter's uninterruptible power supply about the failure of the voltage supply. The value must be greater than or equal to 2,500. This setting is immediately adopted after the file is uploaded. System Manual CoMVPP-SH-US_en-20 83

88 6 Operation SMA America, LLC Example: XML file for setting the English language of the user interface <?xml version="1.0" encoding="utf-8" standalone="yes"?> - <WebBox xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" xmlns:xsi=" XMLSchema-instance" xsi:nonamespaceschemalocation="config_100.xsd"> -<Info> <Version>my config V1.01</Version> </Info> <Config> <Key>NativeSettings_Language</Key> <Value>en</Value> </Config> </WebBox> Parameters and Values for the custom.xml File Parameter Explanation Values Default values NetworkSettings_DhcpUsage1 Activates the DHCP for LAN2. The True True False value ignores all other settings of the IP addresses for LAN2. False NetworkSettings_DnsIpAddr1 Sets the first IPv4 address of the DNS server for LAN A valid IPv4 address NetworkSettings_Dns2IpAddr1 Sets the second IPv4 address of the DNS server for LAN A valid IPv4 address NetworkSettings_Gateway1 Sets the gateway address for LAN NetworkSettings_IpAddr1 Sets the IPv4 address for LAN2 A valid IPv4 address NetworkSettings_SubnetMask1 Sets the subnet mask for the LAN NetworkSettings_DhcpUsage2 Activates the DHCP for LAN3. The True True False value ignores all other settings of the IP addresses for LAN3. False NetworkSettings_DnsIpAddr2 Sets the first IPv4 address of the DNS server for LAN A valid IPv4 address NetworkSettings_Dns2IpAddr2 Sets the second IPv4 address of the DNS server for LAN A valid IPv4 address NetworkSettings_Gateway2 Sets the gateway address for LAN NetworkSettings_IpAddr2 Sets the IPv4 address for LAN3 A valid IPv4 address NetworkSettings_SubnetMask2 Sets the subnet mask for the LAN CoMVPP-SH-US_en-20 System Manual

89 6 Operation Parameter Explanation Values Default values NetworkSettings_ModbusPort NetworkSettings_ModbusUsage NetworkSettings_WebserverPort Sets the Modbus port. The following ports must not be used: 21 / 23 / 8081 / Activates the use of the Modbus protocol Sets the port of the web server. The following ports must not be used: 21 / 23 / 502 / 8081 / Communication with Sunny Portal Information on Communication with Sunny Portal 502 True False You can present your inverter data in Sunny Portal (for information on Sunny Portal, see the Sunny Portal user manual at The Sunny Portal monitors the PV system and displays the yield and power output. In addition, Sunny Portal can send useful reports via . If the SC-COM is unable to connect to the Sunny Portal, it will store the collected PV system data in a ring buffer. If the ring buffer is full, the SC-COM will overwrite the oldest data first. The SC-COM will send the data to Sunny Portal with the next data upload. The time needed by the ring buffer to bridge depends on the device type and number of detected devices. On the Sunny Central > Info page, you can see when the SC-COM last successfully transmitted data. Evaluating the collected data takes time. Note that it can take several minutes for Sunny Portal to display the data of your PV system. True 80 NativeSettings_Language Sets the language of the user interface: en English en Czech cs German de Greek el Spanish es French fr Italian it Korean ko Dutch nl Portuguese pt Security_InstallerPassword Sets the installer password sma System Manual CoMVPP-SH-US_en-20 85

90 6 Operation SMA America, LLC Accessing the SC-COM via Sunny Portal Using Sunny Portal, you can access the SC-COM via the Internet. Every time the SC-COM connects with Sunny Portal, Sunny Portal saves the current address of the SC-COM or your router with which the Internet connection is established. If your router is configured accordingly, you can access your SC-COM via Sunny Portal. The last IP address that the SC-COM used to connect to Sunny Portal will be updated by the SC-COM during each data transmission. You can view this IP address in Sunny Portal by selecting Device Overview > Device Properties. If your network is permanently connected to the Internet, your Internet provider may interrupt the connection at regular intervals. This usually happens every 24 hours. When you establish a new Internet connection, your Internet provider will assign a new IP address to your network. The SC-COM will use the new IP address to connect to Sunny Portal. The IP address displayed by SC-COM is always up-to-date. Accessing the SC-COM via Sunny Portal after a Change of IP Address When your Internet provider assigns a new IP address to your network, Sunny Portal will not be able to access the SC-COM immediately. Before it can be accessed, the SC-COM must first send its new IP address to the Sunny Portal. The SC-COM transmits the IP address of the network every time data is transmitted. The Router Must Forward Data Requests to the SC-COM To access the SC-COM via the Sunny Portal, your router must be configured to forward all data requests from Sunny Portal to the SC-COM. If you are unable to access the SC-COM, make sure the router settings are correct User Rights and Data Security User Groups The SC-COM distinguishes between the "user" and "installer" user groups. The distinction is made via different passwords. If the password is the same for both user groups, you will be logged in as installer. To prevent two users from making changes at the same time, only one user can ever be logged into the SC-COM at a time. User group User Installer Rights Configure the system settings of the SC-COM, such as date and time Configure all network settings of the SC-COM except for the network port setting Read out the instantaneous values and parameter settings Change the password for the "user" user group All rights of the "user" user group Set the inverter parameters Restore the default settings of the SC-COM Delete the device description Delete the Sunny Portal buffer Change passwords for both user groups 86 CoMVPP-SH-US_en-20 System Manual

91 6 Operation Strength of Passwords To improve the strength of your password, note the following points when selecting a password: Use passwords with a minimum length of eight characters. The longer the password, the more secure it is. Do not use names or common words (e.g. dog, cat or house). Do not use data related to your person as passwords (for example names of persons or pets, personal numbers or identification numbers, car license plates). Do not repeat names or words (e.g. househouse, catcat). Use a combination of upper and lower case letters, special characters and numbers. Do not use number and letter combinations which are consecutive on a keyboard (for example "12345", "qwert") Increasing Data Security The inverter can be connected to the Internet. Note that connecting to the Internet carries the risk that unauthorized users can gain access to and manipulate your data. Change the password after your first login. Make sure you use a high-strength password (see Section , page 87). Change your passwords at regular intervals (see Section , page 87). Protect your password from access by unauthorized users. Never leave slips of paper with passwords lying around. Set up a firewall. Close unnecessary network ports. 6.3 Network Settings This section describes how to configure the network settings for your PV system. You must choose between a static or dynamic network and adjust the network ports if necessary Configuring the Network Settings on the Computer Before you can change the network settings, you must configure the computer to the network settings of the inverter. Administrator rights in the operating system For commissioning, you need to have the appropriate administrator rights to change the computer network settings. For questions about administrator rights, contact your network administrator. Procedure: 1. Note down the IP address of the computer. 2. Adapt the IP address of the computer to the address range of the inverter. System Manual CoMVPP-SH-US_en-20 87

92 6 Operation SMA America, LLC Configuring the Inverter for the Local Network Information on Integrating the Inverter into a Local Network Protecting the Ethernet network from external attacks Protect your Ethernet network from external threats through suitable safety measures such as a firewall and the allocation of secure passwords. You select a static IP address yourself. Use the address range which is available to your router. In most cases the address range of the router lies between and If necessary, refer to the manual of your router. Note during the allocation of the IP address that the first three address parts of the IP address must be identical for all nodes of the same network. You may not allocate the same IP address twice. Example: Allocating IP addresses Router: Computer 1: Computer 2: LAN2 of the inverter: You can also change the network settings of the inverter via the XML file custom.xml (see Section 6.2.6, page 81) Configuring the Inverter for Static Networks The communication interface of the inverter has three LAN interfaces to the connected nodes. Network Default IP address LAN1: Service interface of the inverter * LAN2: Control network LAN3: Monitoring network * This IP address cannot be changed. Procedure: 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Settings > Network. 3. In the IP address field, enter the static IP address that you want to use to access the inverter in the local network. 4. Enter the subnet mask of your network in the field Subnet mask. 5. Enter the gateway IP address of your network in the field Gateway address. Usually, the IP address of the router has to be entered here. 6. Enter the IP address of the DNS server (Domain Name System) in the DNS server address field. Usually, the IP address of the router has to be entered here. 7. Select [Save] and [Confirm]. 8. To log off from the user interface, select [Logout]. 88 CoMVPP-SH-US_en-20 System Manual

93 6 Operation Configuring Inverters for Dynamic Networks The communication interface of the inverter can obtain its network settings via a DHCP server. The IP address, subnet mask, gateway and DNS server are automatically assigned from the DHCP server here. Use of DHCP Before you convert the communication interface of the inverter to dynamic IP address assignment, check your DHCP server. The DHCP server must extend the lease of the assigned IP address. Do not use the DHCP server if it assigns a new IP address after the lease has expired. DHCP servers can normally list all devices to which you have assigned an IP address. You can then identify the communication interface of the inverter, the SC-COM, by means of its MAC address. The MAC address of your SC-COM can be found on the type label or by selecting Sunny Central > Info in the user interface. Procedure: 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Settings > Network. 3. Activate DHCP in the IP address field. 4. Select [Save]. 5. To log off from the user interface, select [Logout] Adjusting Network Ports If you would like to make the inverter available on the Internet to allow, for example, direct access to the inverter via the Sunny Portal, you must configure a port redirection in your router. This may require the adjustment of the network ports. For the various services, the communication interface of the inverter uses four network ports. If these ports are reserved for other applications in your network, you can change the ports. Adjusting the Network Ports Make sure that the SC-COM can access the web server before you change the Public virtual HTTP port setting on the user interface. In most cases, the settings do not have to be changed manually, as the router automatically forwards the queries to the correct ports via the network. Before adjusting the ports, contact your network administrator. Procedure: 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Settings > Network. 3. In the field Virtual public HTTP port, enter the port enabled in the router for HTTP access. This port allows you to access the SC-COM web server via the Internet. 4. In the field Webserver port, enter the port over which the web server of the SC-COM can be reached. 5. In the field Webservice port, enter the port via which the SC-COM sends data to Sunny Portal and loads firmware updates. 6. If you would like to use the Modbus *, activate the box Use Modbus. Unauthorized access to the inverter If you activate the Modbus option, unauthorized access to the inverter is possible. Even users without passwords will be able to view the instantaneous values of supported devices or change the system time. 7. In the field Modbus port, enter the port that you want the SC-COM to use when communicating via the Modbus protocol. The default setting is port If you would like to use proxy server, activate the box Use proxy server. 9. Enter the IP address and the port of the proxy server in the field Proxyserver address. *Modbus is a registered trademark of Schneider Electric and is licensed by the Modbus Organization, Inc. System Manual CoMVPP-SH-US_en-20 89

94 6 Operation SMA America, LLC 10. If you would like to use the authentication of the proxy server, activate the box Use authentication. 11. Enter the data of your proxy server in the fields User name and Password. 12. Select [Save]. 13. To log off from the user interface, select [Logout]. 6.4 Displaying Operating Data You can call up the operating data on the touch display, on the user interface or in Sunny Portal. Depending on requirements, select how the operating data should be visualized Displaying the Operating Data on the Touch Display On the touch display of the inverter, you can view the inverter data, the instantaneous values of the DC and AC side, the fed-in energy as well as the data on active and reactive power. You can access this operating data by selecting certain symbols on the touch display (see Section , page 186) Displaying the Operating Data via the User Interface 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Data > Devices. 3. Select. A list of existing device types appears. 4. Select the desired device type. A list appears containing all existing devices of this type. 5. Select the desired device from the list. 6. Select the tab Spot values. The list of operating data is displayed. 7. To log off from the user interface, select [Logout] Displaying the Operation Data via Sunny Portal Registering the Inverter in Sunny Portal Automatic PV system identifier Sunny Portal uses this number to uniquely identify the PV system. In general, you do not have to change the preset number in the field PV system identifier field. If you have not yet registered in Sunny Portal, the SC-COM will automatically enter the preset PV system identifier in Sunny Portal after the first successful data upload. Sunny Portal will send the login data to the address you entered in the Operator field. You are now registered in Sunny Portal. Procedure: 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Settings > Data transmission. 3. Enter the name of your PV system in the PV system name field. The name you enter will be displayed as the PV system name in Sunny Portal. 4. Set the data transmission frequency (see Section 6.5.2, page 92). 5. Select yes in the field Use Sunny Portal. 6. If you are already registered in Sunny Portal with the same PV system, update the PV system identifier in the PV system identifier field (see Section , page 91). 90 CoMVPP-SH-US_en-20 System Manual

95 6 Operation 7. Enter your address in the Operator field. Sunny Portal then sends your access data to the address entered. 8. Select [Save]. 9. Select Sunny Central > Info. 10. Select [Register] in the field Last Sunny Portal registration. The Sunny Portal password will be sent to the entered address. 11. To log off from the user interface, select [Logout] Adjusting the PV System Identifier for Sunny Portal Sunny Portal identifies the inverter via the PV system identifier. In the following cases, you must adjust the PV system identifier on the user interface. Data has already been sent to Sunny Portal via another communication device. The set PV system identifier was reset. The SC-COM was replaced by a different SC-COM. Procedure: 1. Log into Sunny Portal ( 2. Select Configuration > PV System Properties. 3. Copy the PV system identifier to the clipboard. 4. Log into the user interface (see Section 9.5.1, page 173). 5. Select Sunny Central > Settings > Data transmission. 6. Delete the content of the PV system identifier field. 7. Paste the PV system identifier from the clipboard into the field PV system identifier. 8. Select [Save]. 9. To log off from the user interface, select [Logout] Deleting the Sunny Portal Buffer You can delete the data on the internal ring buffer. Procedure: 1. Log into the user interface as an installer (see Section 9.5.1, page 173). 2. Select Sunny Central > Info. 3. Select [Delete] in the field Sunny Portal buffer load. 4. To log off from the user interface, select [Logout] Displaying the Event Report The event report keeps a log of various SC-COM events, e.g. errors and warnings. The SC-COM can display the last 500 events of the report. Procedure: 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Events. The event report is displayed. 3. To log off from the user interface, select [Logout]. System Manual CoMVPP-SH-US_en-20 91

96 6 Operation SMA America, LLC 6.5 Saving the Operating Data This Section describes various methods for downloading and saving operating data. You must select the desired method Increasing Storage Capacity by Averaging The communication interface of the inverter can form an average value using the data from a specified time frame. In this way, the data of the connected devices can be compressed and occupy less memory space in the SC-COM. Procedure: 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Recording. 3. In the Averaging over field, select the time period for which the SC-COM is to calculate the average. 4. Select [Save]. 5. To log off from the user interface, select [Logout] Setting the Data Transmission Frequency The communication interface of the inverter can send the data to the Sunny Portal or to an external FTP server. You can specify how often and in what interval data will be sent by the SC-COM. All data upload settings are related to both data upload to the Sunny Portal as well as to data upload to an external FTP server. If the data transmission to the Sunny Portal or external FTP server fails, the SC-COM will make further attempts to transmit the data. Procedure: 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Settings > Data transmission. 3. Select the upload frequency and time window in the field Upload frequency per time window. 4. Select the maximum number of upload attempts in each time window in the field Maximum number of upload attempts per time window. 5. Select [Save]. 6. To log off from the user interface, select [Logout]. 92 CoMVPP-SH-US_en-20 System Manual

97 6 Operation Downloading Operating Data Using the FTP Server Defining Read and Write Access Rights for the FTP Server The communication interface of the inverter has an integrated FTP server. You can use the FTP server to access the data on the SC-COM. The data is available for view and download in CSV or XML format (see Section 6.5.4, page 94). In order to use the FTP server, you must first assign the respective read and write access rights for the FTP server on the user interface. Procedure: 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Settings > Security. 3. Select an option in the field FTP server: Option Read/write Read only off Explanation You have read and write access rights on the integrated FTP server. You only have read access rights on the integrated FTP server. The integrated FTP server is deactivated. 4. Select [Save]. 5. To log off from the user interface, select [Logout] Accessing the FTP Server via the Internet Browser You can log into the FTP server of the SC-COM as either "user" or "installer". Stored user name and password in the Internet browser After you access the FTP server with an Internet browser, user name and passwords can remain saved in the Internet browser cache. Clear the Internet browser cache to prevent unauthorized access to the FTP server. Procedure: 1. Start your Internet browser. 2. Enter the FTP address of the SC-COM with your user name and password as: ftp://[user address] Example: Entering the FTP address If you want to log into the SC-COM with IP address and your user name is "user" and password "1234", the correct FTP address is 3. Press the enter key. A list of files on the FTP server is displayed. System Manual CoMVPP-SH-US_en-20 93

98 6 Operation SMA America, LLC Sending Data via FTP Push The communication interface of the inverter has an FTP push function. With this function, the inverter can upload the data collected from your PV system to a local FTP server as an XML file (for information on installing a local FTP server and testing the FTP push function, see the Technical Information "Setting Up the FTP Push Function" at This section describes how to set and test the FTP push function. Setting and Testing the FTP Push Function 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Settings > Data transmission. 3. Select yes in the Use FTP-Push service field. 4. Enter the URL and port of the FTP server in the field FTP server. 5. In the field Upload directory field, specify the desired folder on the FTP server in which the data is to be saved. 6. Select an option in the field Use authentication: Option Explanation yes Authentication is needed for the FTP server. Continue with step 7. no Authentication is not required. Continue with step Enter the data of your FTP server in the fields User name and Password. 8. Set the data transmission frequency (see Section 6.5.2, page 92). 9. To test the FTP push function, select the [Test] button in the field Test FTP connection. Test file is sent to the FTP server. Test file is not sent to the FTP server? Ensure that the address of the FTP server and the upload directory are correct. Repeat the FTP connection test. If an error occurs, contact your network administrator. 10. Select [Save]. 11. To log off from the user interface, select [Logout] Downloading Operating Data via HTTP You can download the operating data collected via HTTP download. This function makes it possible to manually download your collected PV system data in CSV or XML format to your computer. You have to select the desired format Downloading Data in XML Format 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Recording. 3. Select XML in the Format field. 4. Select the required month in the field Download. The data for the prior twelve months is available for download via the user interface. 5. Select [Download]. 6. Choose the save location. 7. Select [Save]. 8. To log off from the user interface, select [Logout]. 94 CoMVPP-SH-US_en-20 System Manual

99 6 Operation Downloading Data in CSV Format Data saved in CSV format can be automatically imported into tables (e.g. in Microsoft Excel). The data is structured based on the separator and end of line characters that you specify. Procedure: 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Recording. 3. Select the option CSV in the field Format. 4. Select [Configure]. 5. Select the desired format of the file name in the field Filename format. 6. Select an option in the field Create column headers: Option yes no Explanation A header is added to the CSV file. No header is added to the CSV file. 7. Select an option in the field End-of-line character. Option Explanation CRLF (Windows) Control character for Windows that is used to separate lines in a CSV file. LF (Unix/Linux) Control character for Linux that is used to separate lines in a CSV file. CR (Mac) Control character for Macintosh that is used to separate lines in a CSV file. 8. In the field Separator character, select the character you want to use to separate content in the CSV file. Tip: If you want to import CSV data into Microsoft Excel for evaluation, choose Comma as the separator. 9. In the field Number format, select the desired number format. Tip: If you want to import CSV data into Microsoft Excel for evaluation, select #.## as the number format. 10. In the field Timestamp format, select the desired time format. 11. Select an option in the field Format of the status channels: Option Numeric Plain text Explanation Status information on the inverter is displayed in numeric format. Status information on the inverter is displayed as text. 12. Select [Save]. 13. Select the required month in the field Download. The data for the prior twelve months is available for download via the user interface. 14. Select [Download]. 15. Select [Save]. 16. Choose the save location. 17. Select [Save]. 18. To log off from the user interface, select [Logout]. System Manual CoMVPP-SH-US_en-20 95

100 6 Operation SMA America, LLC Saving the Operating Data on the Memory Card Information on Saving Data on a Memory Card You can save all the data collected from the inverter to a memory card. The save-to-memory-card feature is disabled by default. If a memory card is inserted into the slot of the SC-COM and the save-data-to-external-storage-media setting is enabled, the SC-COM will copy all data from the internal ring buffer to the external SD card. The SC-COM stores new data on the memory card for as long as the memory card is inserted in the slot. The SC-COM creates a folder on the memory card. The name of the folder is "SC-COM_[SerialNumber]". "[SerialNumber]" designates the serial number of the respective SC-COM. The SC-COM creates a new subfolder in the main folder every day. Each subfolder contains all the operating data collected by the SC-COM. When the memory card has reached its capacity, the H5 LED glows red and no further data is stored on the memory card. Replace the memory card or reformat it on the computer. Data loss when removing the memory card Do not remove the memory card while data is being stored on the memory card. The SDHC LED flashes when data is being stored on the memory card. Removing the memory card when data is being stored can destroy the file system on the memory card and lead to the loss of data. Depending on the amount of data, the writing process can take some time Inserting the Memory Card 1. Danger to life from electric shock due to live voltage Disconnect the inverter (see Section 5.3.1, page 65). 2. Insert the memory card into the slot of the SC-COM in each inverter Enabling Data Storage on the Memory Card 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Settings > Security. 3. Select Enabled in the field External storage media. 4. To log off from the user interface, select [Logout]. 96 CoMVPP-SH-US_en-20 System Manual

101 6 Operation Displaying the Memory Capacity Available on the Memory Card 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Info. 3. The field SD card memory capacity field shows how much memory space is available on the memory card. 4. To log off from the user interface, select [Logout]. 6.6 Setting the Parameters In the following section, all parameters that are relevant for the safe operation of the inverter and the MV Power Platform are specified. Only change the parameters that are relevant for your project Grid Management Services Setting the Power Frequency-Dependent Active Power Limitation Information on how power frequency-dependent active power limitation works can be found in Section , page 208. Information on default values and on the value range can be found in Section , page 234. Procedure: 1. Call up the parameter overview (see Section 9.5.3, page 173). 2. Set the parameter P-HzStr. 3. Set the parameter P-HzStop. 4. Set the parameter P-WGra. 5. Save the parameter change (see Section 9.5.4, page 173) Setting the Active Power Limitation Independent of the Frequency There are five different procedures for power frequency-independent active power limitation. Information on the procedure can be found in Section , page 209. Information on default values and on the value range can be found in Section , page 234. Parameter blocking The parameter P-WMod may only be changed in the operating state "Stop". The entry will not be accepted in other operating states. Procedure: 1. Make sure the inverter is in the operating state "Stop". 2. Call up the parameter overview (see Section 9.5.3, page 173). 3. Select the procedure for power frequency-dependent active power limitation via the parameter P-WMod. 4. If the WCnst procedure was selected, set the parameter P-W. 5. If the WCnstNom procedure was selected, set the parameter P-WNom. 6. Save the parameter change (see Section 9.5.4, page 173). System Manual CoMVPP-SH-US_en-20 97

102 6 Operation SMA America, LLC Setting the Reactive Power Control There are eleven different procedures for reactive power regulation. Information on the procedure can be found in Section , page 210. Information on default values and on the value range can be found in Section , page 234. If a displacement power factor cos φ of 1 is to be maintained permanently, SMA recommends using the PFCnst procedure. Parameter blocking The parameter Q-VARMod may only be changed in the "Stop" operating state. The entry will not be accepted in other operating states. Procedure: 1. Make sure the inverter is in the operating state "Stop". 2. Call up the parameter overview (see Section 9.5.3, page 173). 3. Select the procedure for active power limitation independent of the power frequency via the parameter Q-VArMod. 4. If the VArCnst procedure was selected, set the parameter Q-VAr via the field Value. 5. If the VArCnstNom procedure was selected, set the parameter Q-VArNom. 6. If the PFCnst procedure was selected, set the parameters PF-PF and PF-PFExt. 7. If the PFCnstAnIn procedure was selected, set the parameter PFAbsMin. 8. If the PFCtlW procedure was selected, set the following parameters: Set the parameter PF-PFStr. Set the parameter PF-PFExtStr. Set the parameter PF-PFStop. Set the parameter PF-PFExtStop. Set the parameter PF-WStr. Set the parameter PF-WStop. 9. If the VArCtlVol procedure was selected, set the following parameters: Set the parameter Q-VDif. Set the parameter Q-VArGra. Set the parameter Q-VDifTm. Set the parameter Q-VRtgOfsNom. 10. If the VArCtlVolHystDb procedure was selected, set the following parameters: Set the parameter Q-VolWidNom. Set the parameter Q-VolNomP1. Set the parameter Q-VolNomP2. Set the parameter Q-VArGraNom. Set the parameter Q-VArTmsSpnt. Set the parameter Q-VArTmsVtg. Set the parameter Q-EnaTmsVtg. 11. Save the parameter change (see Section 9.5.4, page 173) Setting Q at Night Information on the procedure can be found in Section , page CoMVPP-SH-US_en-20 System Manual

103 6 Operation Setting Full and Limited Dynamic Grid Support (FRT) Information on full and limited dynamic grid support can be found in Section , page 228. Information on default values and on the value range can be found in Section , page 248. Function limitation The FRT function cannot be active at the same time as the Active Islanding Detection function. Procedure: 1. Call up the parameter overview (see Section 9.5.3, page 173). 2. Set the parameter FRTEna. 3. Set the parameter FRTArGraNom. 4. Save the parameter change (see Section 9.5.4, page 173) Grid Monitoring Setting the Line Voltage Monitoring Information on how grid monitoring works in relation to the line voltage can be found in Section 10.7, page 204. Information on default values and on the value range can be found in Section , page 245. UL listing for Sunny Central CP-US The default limiting values for the line voltage and the power frequency are configured in accordance with IEEE 1547, as required for UL1741 certification. These parameters may only be changed by authorized personnel at the written direction of the utility. The inverter can be operated outside the IEEE 1547 limits when required by the utility without loss of UL certification. Do not make any changes to the default limiting values for the grid monitoring parameters unless directed by the utility (see Section 9.3.2, page 170). Procedure: 1. Call up the parameter overview (see Section 9.5.3, page 173). 2. Set the parameter VCtlhhLimTm. 3. Set the parameter VCtlhLimTm. 4. Set the parameter VCtlhhLim. 5. Set the parameter VCtlhLim. 6. Save the parameter change (see Section 9.5.4, page 173) Setting Power Frequency Monitoring Information on how grid monitoring works in relation to power frequency can be found in Section , page 206. Information on default values and on the value range can be found in Section , page 245. UL listing for Sunny Central CP-US The default limiting values for the line voltage and the power frequency are configured in accordance with IEEE 1547, as required for UL1741 certification. These parameters may only be changed by authorized personnel at the written direction of the utility. The inverter can be operated outside the IEEE 1547 limits when required by the utility without loss of UL certification. Do not make any changes to the default limiting values for the grid monitoring parameters unless directed by the utility (see Section , page 245). Procedure: 1. Call up the parameter overview (see Section 9.5.3, page 173). System Manual CoMVPP-SH-US_en-20 99

104 6 Operation SMA America, LLC 2. Set the parameter HzCtlMaxTm. 3. Set the parameter HzCtlhhLimTm. 4. Set the parameter HzCtlhLimTm. 5. Set the parameter HzCtllhLimTm. 6. Set the parameter HzCtlllhLimTm. 7. Set the parameter HzCtlMinTm. 8. Save the parameter change (see Section 9.5.4, page 173) Setting the Active Power Ramp-Up During regular start-up of the inverter, you can set the feed-in power to ramp up using the parameter WGra. This means that the inverter gradually increases the percentage feed-in power per second using the set value. If you do not set this parameter, the inverter will reach its maximum feed-in power in 400 ms. Information on default values and on the value range can be found in Section , page 231. Procedure: 1. Call up the parameter overview (see Section 9.5.3, page 173). 2. Set the parameter WGra. 3. To activate active power ramp-up, set the parameter WGraEna to On. 4. Save the parameter change (see Section 9.5.4, page 173) Setting the Decoupling Protection Ramp Information on the decoupling protection ramp can be found in Section , page 230. Information on default values and on the value range can be found in Section , page 231. Parameter blocking The parameter WGraReconEna must only be changed if the operating state is "Stop". The entry will not be accepted in other operating states. Procedure: 1. Make sure the inverter is in the operating state "Stop". 2. Call up the parameter overview (see Section 9.5.3, page 173). 3. Set the parameter WGraReconEna to On. 4. Save the parameter change (see Section 9.5.4, page 173) Setting the Voltage on the MV Transformer Setting the Secondary Voltage Information on default values and on the value range can be found in Section , page 248. Procedure: 1. Call up the parameter overview (see Section 9.5.3, page 173). 2. Set the parameter TrfVolExlLo. 3. Set the parameter VRtg. 4. Save the parameter change (see Section 9.5.4, page 173). 100 CoMVPP-SH-US_en-20 System Manual

105 6 Operation Setting the Primary Voltage Information on default values and on the value range can be found in Section , page 248. Procedure: 1. Call up the parameter overview (see Section 9.5.3, page 173). 2. Set the parameter TrfVolExlHi. 3. Save the parameter change (see Section 9.5.4, page 173) Setting Optional Parameters Deactivating Transformer Protection A fully hermetic protector is connected to the inverter. This fully hermetic protector is integrated into the MV transformer. If an error occurs in the MV transformer, the inverter switches off immediately. To deactivate this function, the associated parameter must be disabled. Information on default values and on the value range can be found in Section , page 250. Parameter blocking This parameter ExlTrfErrEna may only be changed if the operating state is "Stop". The entry will not be accepted in other operating states. Procedure: 1. Make sure the inverter is in the operating state "Stop". 2. Call up the parameter overview (see Section 9.5.3, page 173). 3. Set the parameter ExlTrfErrEna to Off. 4. Save the parameter change (see Section 9.5.4, page 173) Setting the Active Islanding Detection Information on islanding detection can be found in Section , page 199. Information on default values and on the value range can be found in Section , page 248. Parameter blocking The parameter EnaAid may only be changed if the operating state is "Stop". The entry will not be accepted in other operating states. The "Active Islanding Detection" function cannot be active at the same time as the FRT function. Procedure: 1. Make sure the inverter is in the operating state "Stop". 2. Call up the parameter overview (see Section 9.5.3, page 173). 3. Set the parameter EnaAid to On. 4. Save the parameter change (see Section 9.5.4, page 173). System Manual CoMVPP-SH-US_en

106 6 Operation SMA America, LLC Project-Specific Parameters Setting the Country Parameter blocking Some parameters may only be changed in the operating state "Stop". The entry will not be accepted in other operating states. Procedure: 1. Make sure the inverter is in the operating state "Stop". 2. Call up the parameter overview (see Section 9.5.3, page 173). 3. Set the parameter CntrySet. 4. Save the parameter change (see Section 9.5.4, page 173) Activating Remote Shutdown If you activate remote shutdown, the inverter can be switched off and shut down via an external signal. Information on how to make the signal connection can be found in Section 4.8.7, page 51 and in Section 4.8.8, page 52. Procedure: 1. Call up the parameter overview (see Section 9.5.3, page 173). 2. To activate remote shutdown, set the parameter ExlStrStpEna to On. 3. Save the parameter change (see Section 9.5.4, page 173). 6.7 Setting the Insulation Monitoring of the PV System This Section describes how you switch the PV array from grounded operation to insulated operation and back. Switching can be of use for maintenance or service work on the PV array, e.g. cutting the grass You have to select the cable applicable to the insulation monitoring of your PV system Setting the Insulation Monitoring Device Switching between Main Menu and Standard Operation To switch from standard operation to the main menu, press the [MENU] button. You can enter various sub-menus from the main menu. To return to standard operation, press the [RESET] button Selecting PV Modules Used There are various measurement profiles available for the insulation monitoring. Select the measurement profile that is suitable for your PV modules. Module types PV modules with crystalline cells PV modules with thin-film PV cells Other PV modules Measurement profile AMP3 AMP4 AMP Procedure: 1. Access Main Menu. 2. Select the ISO ADVANCED menu and then select the Measure menu. 3. Select the measurement profile that matches the PV modules 4. and confirm by pressing [ENTER]. 102 CoMVPP-SH-US_en-20 System Manual

107 6 Operation Setting the Insulation Monitoring of the PV System with GFDI and an Insulation Monitoring Device Safety during Insulation Monitoring of the PV System with GFDI and an Insulation Monitoring Device Danger to life from electric shock due to live voltage There are high voltages present in the MV Power Platform and its components. Touching live components results in death or serious injury due to electric shock. Disconnect the inverters (see Section 5.3.1, page 65). Ground fault monitoring with GFDI does not provide protection from injury. The option "GFDI and insulation monitoring device" allows you to manually switch the PV array from grounded operation to insulated operation. To ensure that there is no insulation error on the grounded terminal, an insulation measurement is carried out. After switching to insulated operation, the insulation monitoring device checks each terminal of the PV array for potential insulation errors. Switching to insulated operation is useful whenever you need to perform maintenance or service work on or near the PV array (e.g. cutting the grass) or check the status of the insulation at regular intervals. After the maintenance work, the PV system should be switched to grounded operation once again Switching to Insulated Operation 1. Set the key switch on the inverter to Stop. 2. Wait 15 minutes. This ensures that the capacitors are discharged. 3. Open the inverter. 4. Manually switch off the GFDI circuit breaker. 5. Close the inverter. 6. Set the key switch on the inverter to Start. The insulation monitoring device starts collecting data. If the parameter IsoErrIgn is set to On,the error insulation failure ignored is displayed. The displayed error 3504 does not disappear after 15 minutes? The insulation is defective. Have the insulation checked and, if necessary, repaired by a qualified person. Acknowledge the error (see Section 7.3, page 107). 7. After a few minutes, display the instantaneous value Riso on the user interface (see Section 6.4.2, page 90). The insulation resistance Riso is greater than 45 k Ω. It is safe to enter the PV system. The insulation resistance Riso is less than 45 k Ω? There is an insulation error and the PV system must not be entered. Have the insulation checked and, if necessary, repaired by a qualified person. System Manual CoMVPP-SH-US_en

108 6 Operation SMA America, LLC Switching to Grounded Operation 1. Set the key switch on the inverter to Stop. 2. Wait 15 minutes. This ensures that the capacitors are discharged. 3. Open the inverter. 4. Check the insulation resistance displayed at the insulation monitoring device. If the insulation resistance is less than 1 k Ω, an insulation error occurred while the device was in insulated operation. This error must be remedied. The inverter must not be switched on. If the insulation resistance is greater than 1 k Ω, no insulation error occurred while the device was in insulated operation. 5. Switch on the GFDI circuit breaker. 6. Close the inverter. 7. Set the key switch on the inverter to Start Setting the Insulation Monitoring of the PV System with Remote GFDI and an Insulation Monitoring Device Information on Insulating PV Modules Equipped with Remote GFDI and Insulation Monitoring Device Ground fault monitoring with remote GFDI does not provide protection from injury. The "Remote GFDI and insulation monitoring device" option allows for an automatic switching of the PV array from grounded operation to insulated operation. To ensure that there is no insulation error on the grounded terminal, an insulation measurement is carried out. After switching to insulated operation, the insulation monitoring device checks each terminal of the PV array for potential insulation errors. Switching to insulated operation is useful whenever you need to perform maintenance or service work on or near the PV array (e.g. cutting the grass) or check the status of the insulation at regular intervals. After the maintenance work, the PV system should be switched to grounded operation once again Switching to Insulated Operation Set the parameter RemMntSvc to On (see Section 6.6 "Setting the Parameters", page 97). The warning 3517 Isolated mode, isolation detection is displayed. After a waiting time of approximately 15 minutes has expired, the insulation monitoring is activated. The error message 3501 Insulation Failure is displayed. The insulation is defective. Have the insulation checked and, if necessary, repaired by a qualified person. Acknowledge the disturbance (see Section 7.3, page 107) Switching to Grounded Operation Switching to grounded operation is only possible if no insulation errors have been detected. Procedure: Set the parameter RemMntSvc to Off (see Section 6.6 "Setting the Parameters", page 97). or After a ground fault: Turn the key switch to Stop and then back to Start after two seconds. 104 CoMVPP-SH-US_en-20 System Manual

109 6 Operation 6.8 Integrating New Devices into the PV System This section describes how you detect devices of your PV system and delete the device description. You have to carry out these actions for commissioning or recommissioning Detecting New Devices All the devices connected to the inverter can be detected at once. Devices will need to be redetected if you: Exchanged devices in your PV system. Removed devices from your PV system. Added devices to your PV system. Deleted the device description. Detection of a PV system may take several minutes Depending on the number of devices in your PV system, the detection process may vary in duration. If the SC-COM does not indicate any progress after three minutes, cancel the search. Make sure the data cable of each device is properly connected and repeat the search. Procedure: 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Data > Detection. 3. In the field Total number of devices to be detected, enter the number of devices that communicate with the inverter. 4. Select [Start detection]. The SC-COM starts detecting all devices and displays its progress. Once all devices have been detected, the SC-COM displays "### Device detection finished ###". 5. Select [OK]. 6. To log off from the user interface, select [Logout] Deleting Device Descriptions Whenever you replace a device in your PV system, the descriptions of the existing devices need to be deleted so that SC-COM is able to detect new devices. Procedure: 1. Log into the user interface as an installer (see Section 9.5.1, page 173). 2. Select Sunny Central > Info. 3. Select [Erase unit description] 4. To log off from the user interface, select [Logout]. 6.9 Updating the Firmware Information on Updating the Firmware There are a number of ways to update the firmware of the SC-COM. When the SC-COM firmware is updated, all the settings and data will be saved. No access to the user interface During the update, the SC-COM restarts and access to the user interface will be temporarily blocked. System Manual CoMVPP-SH-US_en

110 6 Operation SMA America, LLC Enabling Automatic Firmware Updates If the SC-COM has Sunny Portal access, you can select to have the firmware updated automatically. Every time data is transmitted to Sunny Portal, a check is carried out to determine whether a new firmware version is available. If a new firmware update is available, the firmware update is downloaded and installed at night between 1 a.m. and 4 a.m. The automatic firmware update function is disabled on delivery. Procedure: 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Settings > Data transmission. 3. Select the Yes option in the field Automatic firmware update. 4. Select [Save]. 5. To log off from the user interface, select [Logout] Updating Firmware via the User Interface 1. Log into the user interface (see Section 9.5.1, page 173). 2. Select Sunny Central > Info. The window System information opens. If a new firmware version is available, the new version is displayed in the field Firmware version. 3. If a new version is available, select the [Update] button in the field Firmware version. The SC-COM loads and installs the new firmware. 4. To log off from the user interface, select [Logout]. 106 CoMVPP-SH-US_en-20 System Manual

111 7 Troubleshooting 7 Troubleshooting This section describes how to read out error messages at the inverter and acknowledge them once the cause has been eliminated. A list of error messages can be found in Section 7.4 Corrective Measures in Event of Disturbance, page Safety during the Troubleshooting Danger to life from electric shock due to high voltages in the inverter Even when an error has occurred, high voltages are present in the inverter. Touching live components results in death or serious injury due to electric shock. All activities described in this section must be carried out by qualified personnel only. Observe all safety precautions when working on the inverter. Wear Hazard Risk Category 2 personal protective equipment. If you cannot remedy the error with the help of this document, contact the SMA Service Line. 7.2 Reading Error Messages If an error occurs, you can read the error message via the touch display on the inverter or the user interface Reading Error Messages via Touch Display If an error occurs, the touch display on the inverter shows a warning symbol. Procedure: Select the warning symbol. The touch display lists the error number, delay time, error message and the necessary corrective measure to eliminate the error Reading Error Messages via the User Interface You can read error messages with a computer via the user interface. Procedure: 1. Log into the user interface (see Section 9.5.1, page 173). 2. To display the error message, select the value ErrNo in the instantaneous value view. 3. To display the error message, select the value ErrNo in the instantaneous value view. 4. To display the corrective measure required to eliminate the error, select the value Dsc in the instantaneous value view. 7.3 Acknowledging Error Messages Once the error has been remedied, you can acknowledge the error message using the key switch on the inverter or via the user interface Acknowledging the Error Messages via the Key Switch Dealing with errors Error messages should only be acknowledged once the underlying causes have been eliminated. If the causes of the error have not been eliminated, the error will still be detected after acknowledgement and the error message will appear again. System Manual CoMVPP-SH-US_en

112 7 Troubleshooting SMA America, LLC Procedure: 1. If an insulation error has occurred, switch the insulation monitoring device back on. 2. Turn the key switch to Stop and then back to Start after two seconds Acknowledging Error Messages via the User Interface Dealing with errors Error messages should only be acknowledged once the underlying causes have been eliminated. If the cause of the error has not been eliminated, the error will still be detected after acknowledgement and the error message will appear again. You can only acknowledge errors via the user interface after entering the installer password. Procedure: 1. If an insulation error has occurred, switch the insulation monitoring device back on. 2. Log into the user interface (see Section 9.5.1, page 173). 3. Select the parameter Ackn in the device displaying the error, and set it to Ackn. 4. Acknowledge entry with [Save] Displaying the Error Message Delay Time Certain errors, such as grid error, cause the inverter to shut down. If this is the case, there is a time for which the inverter waits before restarting. This is referred to as the delay time of the error message (TmsRmg). The inverter will show the delay time on the touch display when the error is read out. Procedure: 1. Log into the user interface (see Section 9.5.1, page 173). 2. Go to the Instantaneous values tab on the user interface. 3. View the delay time via the TmsRmg channel. 7.4 Corrective Measures in Event of Disturbance Inverter Behavior in the Event of an Error If a disturbance occurs during inverter operation, this may be a warning or error. Each disturbance has two levels that influence the display and system behavior. The inverter only behaves differently in the two levels with a few disturbances. The level changes from 1 to 2 if the disturbance occurs five times within two hours or occurs permanently for two hours. A warning does not affect inverter behavior. The cause of the warning must be established and remedied. If operation is interrupted during an error, the inverter switches to the operating state "Disturbance" and opens the DC switchgear and the AC contactor. The error, error number, error message and a symbol are displayed on the touch display (see Section , page 186). If the cause of the error is rectified and the error is no longer displayed, the error is deleted from the fault memory. To view previous errors after they have been deleted from the fault memory, an event and disturbance file is saved on the SD card. The time when an error occurred and the type of error are entered in the event and disturbance file. This file also contains entries of relevance to service. 108 CoMVPP-SH-US_en-20 System Manual

113 7 Troubleshooting You will find the following information in the error tables in Section 7.4.2, and 7.4.4: Information Level Behavior Explanation Error no. Clearly identifies the disturbance present Explanation Identifies possible causes of the disturbance Inverter behavior Depends on the severity of the disturbance Disturbance level S1, disturbance level S2 Warning (W) Time Acknowledge (A) The inverter has issued a warning that has no impact on how the inverter behaves. The inverter has detected an error and switches into the operating state "Disturbance". The DC switching connection and AC contactor opens and the inverter does not feed in for the specified time. The time indicates how long the error is displayed on the touch display and is saved in the inverter as an error. If the time has elapsed, the error is no longer shown on the touch display. The inverter then checks whether the cause of the error has been rectified. If the cause of the error still exists after the time has expired or the error has been acknowledged, the error occurs again and the inverter remains in the operating state "Disturbance". The inverter switches into the operating state "Disturbance", opens the DC switching direction and AC contactor and does not feed in electricity until the error has been manually acknowledged. When the error has been acknowledged, it is no longer shown on the touch display. The inverter then checks whether the cause of the error has been rectified. If the error is no longer present, it is deleted from the memory. If the cause of the error is still present after the error has been acknowledged, the error occurs again. System Manual CoMVPP-SH-US_en

114 7 Troubleshooting SMA America, LLC Information Level Behavior Explanation Inverter behavior Corrective measures Disturbance level S1, disturbance level S2 Day change (D) The inverter switches into the operating state "Disturbance", opens the DC switching connection and AC contactor and does not feed in. The error message is automatically reset when the day changes. If the error has been reset, it is no longer shown on the touch display. The inverter then checks whether the cause of the error has been rectified. If the error is no longer present, it is deleted from the memory. If the cause of the error is still present after the day has changed or after the error has been acknowledged, the error occurs again. Plant-spec. (C) The inverter switches into the operating state "Disturbance", opens the DC switching connection and AC contactor and does not feed in. How long the inverter remains in this state depends on the plant-specific influencing factors. If the time has elapsed, the error is no longer shown on the touch display. The inverter then checks whether the cause of the error has been rectified. If the error is no longer present, it is deleted from the memory. Reset (R) The control is restarted. The relays are checked and the voltage supply of the control is switched off. This process requires less than one minute. When the control is started up, the inverter's regular waiting times for grid monitoring are maintained. The corrective measures specify measures that can help you rectify the error. 110 CoMVPP-SH-US_en-20 System Manual

115 7 Troubleshooting Error Numbers 01xx to 13xx - Disturbance on the Utility Grid After a grid failure, the inverter monitors the utility grid for a specific period until it is reconnected. If the inverter monitors the utility grid after a grid error, the grid monitoring time is maintained. Certain errors, such as grid errors, cause the Sunny Central to shut down. In this case, the instantaneous value TmsRmg indicates the time during which the inverter monitors the utility grid until it is reconnected. This grid monitoring time can be defined in parameter GdErrTm. Error no. Explanation Behavior of the Sunny Central 0103* Line voltage is too high. Overvoltage detected by redundant monitoring. 0104* Line voltage is too high. Overvoltage detected by standard monitoring. 0203* Line voltage is too low. Undervoltage detected by redundant monitoring. 0204* The line voltage is too low. Undervoltage detected by standard monitoring. 0205* A line conductor of the utility grid has failed. 0502* Power frequencyis too low. Power frequency fault detected by standard monitoring. 0503* Power frequency is too high. Power frequency fault detected by standard monitoring. 0504* Power frequency is too low. Power frequency fault detected by redundant monitoring. 0505* Power frequency is too high. Power frequency fault detected by redundant monitoring. 0506* The Sunny Central has detected a stand-alone grid and disconnected from the utility grid A line conductor of the utility grid has 0802* failed. S 1 S 2 R * Depending on the parameterization, the error message must be acknowledged manually. Corrective measures 30 s C 30 s 30 s 30 s 30 s C 30 s 30 s 30 s Check the line voltage. Check the grid connection. Check whether the utility grid is stable. Make sure the external fuses function properly. Make sure the AC cable connections are securely connected. 30 s 30 s 30 s 30 s Check power frequency. Check the grid monitoring relay display. Make sure the fuses in the load circuit function properly. 30 s 30 s 30 s 30 s W W Check power frequency. 30 s 30 s Check the line voltage. Make sure the external fuses function properly. Make sure the AC cable connections are securely connected Left rotating magnetic field is connected. 30 s Q Check phase position. 1500* The conditions for grid reconnection are not achieved again after a grid error. Make sure all fuses are switched on. W W Check power frequency and line voltage. System Manual CoMVPP-SH-US_en

116 7 Troubleshooting SMA America, LLC Error Number 34xx to 40xx - Disturbance on PV Array Error no. Explanation Behavior of the Sunny Central Corrective measures S 1 S 2 R 3403 The voltage of the PV generator is too high. 15 min 30 min Check the DC input voltage Open-circuit voltage is too high. Disturbance detected through standard monitoring The active power is too high due to the electrical voltage of the PV array being too high The insulation monitoring device has measured that the insulation resistance is too low. For the options "GFDI and insulation monitoring device" and "Remote GFDI and insulation monitoring device", the insulation monitoring device is only active when the GFDI or the remote GFDI is open. 15 min 30 min 15 min 30 min 3502 The GFDI has tripped. C C 3504 The insulation monitoring device has detected an insulation error. Since the parameter IsoErrIgn is set to On, this error is ignored A ground fault has occurred on the Q Q ungrounded pole of the PV array The Sunny Central has found an insulation Q Q error on the inverter bridge The remote GFDI has detected a temporary ground fault The remote GFDI has detected a Q Q permanent ground fault Insulation measuring is being performed. W W 3601 Leakage current to ground has occurred in the PV array or the threshold defined in parameter RisoCtlWarn has been reached. Check the module wiring and plant design. C C Check the PV array for insulation errors. W W Check the grounding and equipotential bonding. Check the module wiring and PV system design. Check the RisoCtlWarn parameter The DC current of the PV array is too high. 1 min D x Check the DC input current. Check the module wiring and plant design. 112 CoMVPP-SH-US_en-20 System Manual

117 7 Troubleshooting Error no. Explanation Behavior of the Sunny Central 4003 Reverse currents detected in the PV array or DC connection polarity reversed. S 1 S 2 R 30 s Q Check PV modules for short circuits. Check the module wiring and plant design. Make sure the DC terminals have the correct polarity Error Numbers 60xx to 90xx - Disturbance on the Sunny Central Error no. Explanation Behavior of the Sunny Central Corrective measures S 1 S 2 R 6002 Calibration data cannot be loaded. Contact the SMA Service Line Data block cannot be loaded from the EEPROM or the channel list has changed (e.g. after a firmware update) 6115 Hardware limiting values on the 5 min 5 min x D/A converters cannot be set Real-time clock is not initialized Device address not recognized. 5 min 5 min x 6119 The data structure for the exchange between the operation control unit and the digital signal processor is invalid. 5 min 5 min x Corrective measures 6120 Waiting for response from the OCU 30 s 6121 Waiting for response from the DSP 30 s 6122 Ten internal monitoring errors have 5 min occurred in succession General error 5 min 5 min 6404 Overcurrent on the L1, L2 or L3 line 30 s 5 min x conductors Overvoltage in the DC link 30 s 5 min x V voltage supply is invalid. 5 min 5 min x V voltage supply is invalid. 5 min 5 min x 6418 Overtemperature on the inverter bridge 5 min 15 min x 6422 The inverter bridge is in an undefined state. 30 s 5 min x Contact the SMA Service Line Overtemperature detected in the switch 5 min 30 min x cabinet 6425 Synchronization error with the utility grid. 30 s 5 min x 6427 Sensor error of the DC voltage measurement. 30 s C x System Manual CoMVPP-SH-US_en

118 7 Troubleshooting SMA America, LLC Error no. Explanation Behavior of the Sunny Central 6440 The MV transformer is no longer 30 s 5 min Check MV transformer. hermetically sealed Sensor error occurred during measurement 30 s 30 s Contact the SMA Service Line. of the DC voltage An unspecified error has occurred in the 30 s digital signal processor Self-test in the inverter bridge failed. Q Q 6448 Insulation monitoring delivers W W Check insulation monitoring. non-permitted values Measured AC voltage from the Sunny Central is less than the voltage from the utility grid. W W 6452 Measured AC voltage from the utility grid is less than the voltage from the Sunny Central. W W 6453 AC voltage failure W W 6454 AC current failure W W 6455 AC voltage failure W W 6456 DC link precharging switch is defective W W 6457 Capacitor self-test has failed Q Q 6461 The insulation monitoring device has not adopted the threshold 6501 Internal temperature in the Sunny Central is too high The temperature of the inverter bridge is too high. 15 mi n 15 min x Set the threshold in parameter RisoCtlWarn. 30 s 30 s 1 min 1 min Make sure that the fans are working properly. Clean the fans. Clean dirty fan inlets and ventilation plates The outside temperature is too high. 30 s 1 min 6605 Fast stop has tripped. 30 s 1 min Contact the SMA Service Line Cable break or short circuit at the Sunny Central temperature sensor 7002 Cable break or short circuit at the Sunny Central temperature sensor 7006 Cable break or short circuit at the Sunny Central temperature sensor S 1 S 2 R Check the wiring of the temperature sensor. Contact the SMA Service Line. Corrective measures 7501 Internal fan is defective. Make sure that the fans are 7502 Internal fan is defective. working properly. Clean the fans Stack fan is defective. Clean dirty fan inlets and 7507 Motor-protective circuit-breaker of the fan ventilation plates. has tripped. 114 CoMVPP-SH-US_en-20 System Manual

119 7 Troubleshooting Error no. Explanation Behavior of the Sunny Central 7601 Internal Sunny Central error 30 s 1 min x Contact the SMA Service Line An internal communication error has 30 s 1 min x occurred An internal communication error has occurred. 30 s 1 min x 7704 Contactor error at the DC disconnection point S 1 S 2 R Corrective measures 30 s Q When disconnecting the Sunny Central from voltage sources, check that all motor-driven circuit breaker switches are set to the OFF position. If the switches are not all set to the OFF position, set all the switches to the OFF position (see the Sunny Central installation manual). Contact the SMA Service Line Error at the digital input of the AC 30 s Q Contact the SMA Service Line. disconnection point 7707 Contactor error at the AC disconnection 30 s Q point 7708 No remote GFDI response % of the switching cycles of the 30 s 30 s integrated DC Disconnect reached % of the switching cycles of the 30 s 30 s integrated DC Disconnect reached 7714 Maximum GFDI switching cycles reached 30 s 30 s 7801 Surge arrester is defective. Check the surge arrester. System Manual CoMVPP-SH-US_en

120 7 Troubleshooting SMA America, LLC Error no. Explanation Behavior of the Sunny Central 7901 An inverse current has occurred at the PV array External active power setpoints are less than 2 ma and therefore invalid. The last valid value is used or Pmax is used after the day has changed. Once the valid setpoints are available again, they are used There are several digital power setpoints present External displacement power factor cos φ is invalid External active- and reactive power setpoints are invalid Power electronics self-test is being carried out. This message disappears once the self-test has been run. 1 min D x Contact the SMA Service Line. W W 9008 Doors were opened during operation. 30 s 1 min 9009 The fast stop was tripped manually. 30 s 30 s Switch the fast stop on again after correcting the error This relates to grid management shutdown. The error is reset via a signal from the grid operator or a grid transfer point safety system signal. S 1 S 2 R Corrective measures 30 s 30 s No corrective measures possible Fast stop cabling is faulty. 30 s Q Check the fast stop cabling Displaying Error Messages and Warnings for Active Power Limitation The instantaneous value P-WModFailStt displays the error messages or warnings associated with active power limitation. Display Off Ok ComFail Cause and corrective measures No procedure for active power limitation has been selected. A procedure for active power limitation has been selected and there are no errors. The WCtlCom procedure has been chosen and the expected signal with a valid active power limitation has been absent for at least five minutes. Corrective measures: Ensure that the inverter and the Power Reducer Box or the SMA Power Plant Controller can be accessed via the Internet. Ensure that the inverter and the Power Reducer Box or the SMA Power Plant Controller are connected correctly. Ensure that the cabling between the inverter and Power Reducer Box or Power or the SMA Plant Controller is OK. 116 CoMVPP-SH-US_en-20 System Manual

121 7 Troubleshooting Display AnInFail ComInvalid Cause and corrective measures The WCnstNomAnIn procedure has been chosen and the value measured at the analogue input is less than 2 ma. Corrective measures: Make sure the signal cable is correctly connected to the analog input. The WCtlCom procedure has been chosen and the information about the specified power output contains invalid content. Corrective measures: Check the settings for the power setpoint on the user interface Displaying Error Messages and Warnings for the Reactive Power Setpoint The instantaneous value Q-VArModFailStt displays errors or warnings relating to the reactive power setpoint. Display Off Ok ComFail AnInFail ComInvalid Cause and corrective measures No procedure for specifying the reactive power setpoint has been selected. A procedure for specifying the reactive power setpoint has been selected and there are no errors. The VArCtlCom or PFCtlCom procedure has been chosen and the expected signal with a valid reactive power setpoint has been absent for at least five minutes. Corrective measures: Ensure that the inverter and the Power Reducer Box or the SMA Power Plant Controller can be accessed via the Internet. Ensure that the inverter and the Power Reducer Box or the SMA Power Plant Controller are connected correctly. Ensure that the cabling between the inverter and Power Reducer Box or Power or the SMA Plant Controller is OK. The VArCnstNomAnIn or PFCnstNomAnIn procedure has been chosen and the value measured at the analogue input is less than 2 ma. Corrective measures: Make sure the signal cable is correctly connected to the analog input. The VArCtlCom or PFCtlCom procedure has been chosen and the information on the power specification settings contains invalid content. Corrective measures: Check the settings for the power setpoint on the user interface. System Manual CoMVPP-SH-US_en

122 8 Maintenance SMA America, LLC 8 Maintenance This section describes the maintenance and repair of the MV Power Platform. The MV Power Platform must always be disconnected before starting maintenance work (see Section 5.3, page 65). During maintenance work in which certain voltage conditions are necessary, the corresponding voltage must be selectively connected (see Section 5.4, page 72). The following table provides an overview of the contents of each section. Section 8.2 Maintenance Schedule and Consumables Description A separate maintenance report is part of the maintenance. This report serves as a master template and must be copied and completed during the maintenance work. This report is to be archived upon completion of maintenance work. 8.1 Safety during Maintenance Overview of the maintenance work, organized by maintenance intervals and devices of the MV Power Platform The materials needed for the respective maintenance work are also listed here. 8.3 Repair Plan and Spare Parts Overview of the repair works, organized by repair intervals 8.4 General Maintenance Overview of the general maintenance work that is applicable to all devices and maintenance intervals 8.5 Sunny Central CP-US to 8.8 MV Transformer Overview of the maintenance work for all MV Power Platform devices in a voltage-free condition or under voltage Danger to life from electric shock due to live voltage There are high voltages present in the MV Power Platform and its devices. Touching live components results in death or serious injury due to electric shock. All work must be carried out in accordance with this document. When working in a high contact-risk environment, wear Hazard Risk Category 2 personal protective equipment. Always perform work in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA), NEC, and NFPA 70E. Do not touch live components. Follow the instructions precisely. Read and comply with the safety messages on the product and in the documentation. Before performing any work on the MV Power Platform, always disconnect all devices whenever live voltage is not absolutely necessary. Ensure that no disconnected devices can be reconnected. After disconnecting the MV Power Platform, wait at least 15 minutes until the inverter capacitors have discharged completely. Comply with all safety precautions (see Section 2.2, page 16). Disconnect the MV Power Platform (see Section 5.3, page 65). Before performing any work on the MV Power Platform, ensure that no voltage is present in any of the devices. 118 CoMVPP-SH-US_en-20 System Manual

123 8 Maintenance Damage to the devices due to dust or moisture penetration Dust or moisture penetration can damage the devices of the MV Power Platform or impair their functionality.[ Do not open any devices during a duststorm, precipitation or when humidity exceeds 95%. Perform maintenance on the devices only when the environment is dry and free of dust. Damage to electronic components due to electrostatic discharge Electrostatic discharge can damage or destroy electronic components. When working on the inverter and handling the assemblies, observe the ESD safety regulations. Wear suitable personal protective equipment for all work on the devices. Discharge electrostatic charge by touching uncoated, grounded enclosure parts (e.g. at the PE connection on the doors). Only then is it safe to touch any electronic components. 8.2 Maintenance Schedule and Consumables Shorter maintenance intervals in the event of adverse ambient conditions The location of the PV system and ambient conditions influence the maintenance intervals. If the MV Power Platform is installed in adverse ambient conditions, SMA recommends a monthly inspection in order to determine the need for maintenance. The maintenance intervals are to be shortened depending on the determined maintenance requirements. In particular, cleaning work and corrosion protection may be necessary more frequently. Observance of maintenance intervals ensures trouble-free operation of the MV Power Platform. Consumables and maintenance materials The following tables only list those consumables and maintenance materials that are not part of the standard equipment of a qualified person. Standard tools and materials such as for example torque wrench, voltage tester or wrench are required for each maintenance operation. Spare Parts Spare parts can be identified via their reference designation and the circuit diagram. The spare-parts list includes the article numbers of each spare part. For information on a specific article number, contact the SMA Service Line. System Manual CoMVPP-SH-US_en

124 8 Maintenance SMA America, LLC Maintenance Work Every Twelve Months Under normal ambient conditions, the following maintenance work must be performed every twelve months Sunny Central CP-US Task Perform general maintenance work (see Section 8.4, page 124). Required maintenance material A suitable water-free, heat-resistant lubricant Talcum, petroleum jelly or wax for maintaining the seals Use touch-up sticks, paint brushes, cans of spray paint or 2K-PUR acrylic paint in the appropriate RAL color to repair small-area surface damages. Use touch-up paint or 2K-PUR acrylic paint in the appropriate RAL color to repair large-area surface damages. Abrasive cloth Ethanol cleaning agent Disconnect Unit Task Perform general maintenance work (see Section 8.4, page 124). Check the bolted connections of the power cabling (see Section , page 149). Required maintenance material A suitable water-free, heat-resistant lubricant Talcum, petroleum jelly or wax for maintaining the seals Use touch-up sticks, paint brushes, cans of spray paint or 2K-PUR acrylic paint in the appropriate RAL color to repair small-area surface damages. Use touch-up paint or 2K-PUR acrylic paint in the appropriate RAL color to repair large-area surface damages. Abrasive cloth Ethanol cleaning agent 120 CoMVPP-SH-US_en-20 System Manual

125 8 Maintenance Auxiliary Services Rack Task Perform general maintenance work (see Section 8.4, page 124). Check the safety messages (see Section , page 146). Required maintenance material A suitable water-free, heat-resistant lubricant Talcum, petroleum jelly or wax for maintaining the seals Use touch-up sticks, paint brushes, cans of spray paint or 2K-PUR acrylic paint in the appropriate RAL color to repair small-area surface damages. Use touch-up paint or 2K-PUR acrylic paint in the appropriate RAL color to repair large-area surface damages. Abrasive cloth Ethanol cleaning agent MV Power Platform Task Required maintenance material Perform an optical inspection of the MV Power Platform (see Section 8.4.1, page 124). Check unprotected surfaces for corrosion and signs of wear MV Transformer Task Maintain the MV transformer(see Section , page 155). Additionally, the information in the manufacturer documentation is to be observed. Clean the oil tray area behind the oil separator (see Section , page 154). Perform an optical inspection of the MV Power Platform (see Section 8.4.1, page 124). Required maintenance material System Manual CoMVPP-SH-US_en

126 8 Maintenance SMA America, LLC Maintenance Work Every 24 Months Under normal ambient conditions, the following maintenance work must be performed every 24 months Sunny Central CP-US Task Required maintenance material Perform twelve-month maintenance (see Section , page 120). Clean the ventilation plate (see Section , page 127). Clean the air duct and the insect screen (see Section , page 128). Checking the Fuses (see Section , page 131). Check the bolted connections of the power cabling (see Section , page 131). Check the surge arrester (see Section , page 133). A surge arrester testing device approved by the manufacturer of the surge arrester, e.g. the PM20 from DEHN + SÖHNE GmbH + Co. KG Check the safety messages (see Section , page 135). Check the heating elements, hygrostat and fans (see Section , page 141). Check the internal DC switch (see Section , page 139). Check the DC contactor (see Section , page 143). Check the internal AC Disconnect (see Section , page 144) Disconnect Unit A testing device approved by the manufacturer of the AC Disconnect e.g. TT1 from ABB. Task Perform twelve-month maintenance (see Section , page 120). Check the functionality of the DC switches (see Section , page 151). Required maintenance material A suitable, water-free and heat-resistant lubricant, e.g. WD Auxiliary Services Rack Task Perform twelve-month maintenance (see Section , page 121). Check the functionality of the disconnect switches on the boxes (see Section , page 148). Required maintenance material A suitable, water-free and heat-resistant lubricant, e.g. WD CoMVPP-SH-US_en-20 System Manual

127 8 Maintenance MV Transformer Task Required maintenance material Perform twelve-month maintenance (see Section , page 121). Check the oil separator and oil tray Pump (see Section , page 152).* Oil separator 4" Petro-Pipe w/1.5" male fitting 16" long, PIT-416 Test the transformer oil (see Section , page 154). * For the option with oil separator and oil tray Unscheduled Maintenance All Devices Task Required maintenance material Contact the SMA Service Line after each short circuit MV Transformer Task In the event of an MV transformer fault, check the oil separator and oil tray (see Section , page 152). In the event of a high pressure alarm, reduce the tank pressure by 2 PSIG (see Section , page 156). In the event of a low pressure alarm, increace the tank pressure by 2 PSIG (see Section , page 156) Required maintenance material - Nitrogen gas tank, regulator, hose with Schrader valve nozzle. 8.3 Repair Plan and Spare Parts Demand-Based Repairs Sunny Central CP-US Task Reading off the Replacement Interval Meter (see Section , page 145) Replacing the GFDI / Soft Grounding / ABB high-performance circuit breaker* Replacing the surge arrester Required maintenance material A surge arrester testing device approved by the manufacturer of the surge arrester, e.g. the PM20 from DEHN + SÖHNE GmbH + Co. KG. * Contact the SMA Service Line. System Manual CoMVPP-SH-US_en

128 8 Maintenance SMA America, LLC MV Transformer Task Exchanging the Fuses (Green Power Fuses) in the MV Transformer (see Section , page 155) Required maintenance material Fuses Mersen AJT Repair Every 10 Years Sunny Central CP-US Task Replacing the 24 V Power Supply Units* Required maintenance material * Contact the SMA Service Line Repair Every 13 Years Sunny Central CP-US Task Required maintenance material Replacing the Inverter Bridge Fan* Replacing the interior fan* * Contact the SMA Service Line. 8.4 General Maintenance This section contains general maintenance work that is applicable to all devices of the MV Power Platform. The tasks described in this section must only be performed when the MV Power Platform is disconnected Optical Inspection Check the device for optical faults such as discoloration, dirt, damage and scratches on the enclosure. If optical faults are present, these are to be repaired immediately. Ensure that there are no objects on or around the MV Power Platform and its devices that are flammable or that can otherwise endanger the operational reliability of the MV Power Platform. Check the welded joints required for attaching the devices for damage. Contact the SMA Service Line if any welded joints are damaged Cleaning the Interior Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. Procedure: Ensure that the switch cabinet is sealed. 124 CoMVPP-SH-US_en-20 System Manual

129 8 Maintenance Remove dirt and dust from the interior of the switch cabinet and from all assemblies (e.g. DC load-break switch and AC circuit breaker). Check for leaks. If leaks are present, fix the leaks. Remove moisture Checking the Seals Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. Figure 41: Section drawing with top view of a door seal (example) Position A B C D E F Designation Seal Side panel Sealing area Hinge Door Frame construction Required maintenance material (not included in the scope of delivery): A suitable water-free, heat-resistant lubricant Talcum, petroleum jelly or wax for maintaining the seals Procedure: Check whether the seals in the sealing area show any damage. If seals are damaged, contact the SMA Service Line. Maintain seals with talcum, petroleum jelly or wax. This prevents frost damage. System Manual CoMVPP-SH-US_en

130 8 Maintenance SMA America, LLC Checking the Latches, Door Stops and Hinges Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. Required maintenance material (not included in the scope of delivery): A suitable water-free, heat-resistant lubricant Procedure: Check whether the doors latch easily. Open and close the doors several times. If the doors do not latch easily, lubricate all moving parts of the latch. Check whether the doors can be held in place. If the doors cannot be held in place, lubricate the door stops. Check whether the door hinges move easily. If the door hinges do not move easily, treat the hinges with lubricant. Lubricate all moving parts and movement points. If the MV Power Platform is installed in regions where below-freezing temperatures occur, apply non-greasing antifreeze to the profile cylinder of the door locks and the key switches in order to protect against freezing Checking the Switch Cabinet for Corrosion Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. Required maintenance material (not included in the scope of delivery): Use touch-up sticks, paint brushes, cans of spray paint or, alternatively, 2K-PUR acrylic paint in the appropriate RAL color to repair small-area surface damages. Observe the relevant instructions of the paint manufacturer. Use touch-up paint or alternatively 2K-PUR acrylic paint in the appropriate RAL color to repair large-area surface damages. Observe the relevant instructions of the paint manufacturer. Position RAL color Color scheme Inverter roof RAL 7004 Signal gray Platform base RAL 7005 Mouse gray Inverter and disconnect enclosures RAL 9016 Traffic white Abrasive cloth Degreaser 126 CoMVPP-SH-US_en-20 System Manual

131 8 Maintenance Procedure: 1. Check surfaces for damage or corrosion. If the surfaces are damaged, repair them without delay or within three weeks at the latest. If the surfaces are corroded, repair them without delay or within three weeks at the latest. 2. Remove dirt from the areas affected. 3. To remove small-area surface damages: Sand the affected area. Clean the affected area with degreaser. Paint the affected area. 4. To remove large-area surface damage: Sand the entire surface. Clean the entire surface with degreaser. Paint the entire surface. 8.5 Sunny Central CP-US Maintenance after Disconnection The tasks described in this section must only be performed when the MV Power Platform is disconnected General Maintenance Perform general maintenance work (see Section 8.4, page 124) Cleaning the Ventilation Plate Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. Property damage and yield losses due to overheating of the devices An impaired air circulation increases the internal temperature and can lead to the reduction of the electrical endurance of temperature-sensitive devices and the performance of the devices. Adapt the cleaning intervals according to the ambient conditions. System Manual CoMVPP-SH-US_en

132 8 Maintenance SMA America, LLC Procedure: 1. Remove the panels (see Section , page 161). 2. Remove the ventilation plate from the inverter cabinet. Grasp under the ventilation plate and press upwards in the middle when removing. 3. Clean the ventilation plate with a brush or vacuum. 4. Push the ventilation plate into the inverter cabinet with the filter frame facing the rear panel; to do this, grasp under the ventilation plate and push it upwards in the middle. 5. Mount the panels (see Section , page 161) Cleaning the Air Duct and the Insect Screens Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. Property damage and yield losses due to overheating of the devices An impaired air circulation increases the internal temperature and can lead to the reduction of the electrical endurance of temperature-sensitive devices and the performance of the devices. Adapt the cleaning intervals according to the ambient conditions. 128 CoMVPP-SH-US_en-20 System Manual

133 8 Maintenance Procedure: 1. Remove the screws of the right-hand insect screen. Use an Allen key. 2. Pull the bottom of the right-hand insect screen forward. This removes the insect screen. 3. Remove the screws of the left-hand insect screen. Use an Allen key. 4. Pull the bottom of the left-hand insect screen forward. This removes the insect screen. 5. Vacuum the air duct from the outside or clean it with a brush. 6. Vacuum the insect screens or clean them with a brush. 7. Check the insect screens for visible damage. The insect screens are not damaged. The insect screens are damaged? Replace the damaged insect screens. System Manual CoMVPP-SH-US_en

134 8 Maintenance SMA America, LLC 8. Insert the right-hand insect screen. 9. Screw the right-hand insect screen in place. Use an Allen key. Torque: 177 in-lb. (20 Nm). 10. Insert the left-hand insect screen. 11. Screw the left-hand insect screen in place. Use an Allen key. Torque: 177 in-lb. (20 Nm) 130 CoMVPP-SH-US_en-20 System Manual

135 8 Maintenance Checking the Fuses Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. Damage to the bolted connections through exceeding the permitted torques Tightening bolted connections that have already reached their permitted torque can damage the bolted connections. Only tighten loose bolted connections to the prescribed torque. Torque specifications are indicated in the circuit diagram of the inverter. Contact the SMA Service Line if specifications are missing. Procedure: Check the fuses and/or isolating blades or tension springs for discoloration and signs of wear. If the fuses and/or isolating blades or tension springs are discolored or show signs of wear, replace them. Check the insulation and terminals for discoloration and signs of wear. If the insulation or terminals are discolored or show signs of wear, contact the SMA Service Line Checking the Bolted Connection of the Power Cabling Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. Risk of fire due to failure to observe torque specifications on live bolted connections Failure to follow the specified torques reduces the ampacity of live bolted connections so that the contact resistances increase. This can cause components to overheat and catch fire. Ensure that live bolted connections are always executed with the exact torque specified in this document. Only use suitable tools when working on the device. Avoid repeated tightening of live bolted connections as this may result in inadmissibly high torques. Damage to the bolted connections through exceeding the permitted torques Tightening bolted connections that have already reached their permitted torque can damage the bolted connections. Only tighten loose bolted connections to the prescribed torque. Torque specifications are indicated in the circuit diagram of the inverter. Contact the SMA Service Line if specifications are missing. System Manual CoMVPP-SH-US_en

136 8 Maintenance SMA America, LLC Checking the bolted connection of the power cabling The bolted connections of the power cabling only need to be checked if no DC Disconnect Units are used and the connection of the power cabling was made by the customer. The bolted connections of the AC connection power cabling do not need to be checked. Figure 42: Position of the power cabling for connection with terminal lugs Position A B C D Designation For negative grounding: connection busbar for DC cables For positive grounding: connection busbar for DC+ cables For negative grounding: connection lugs for DC cables For negative grounding: connection lugs for DC+ cables Connection lugs for AC cables Connection busbar for grounding cable Procedure: 1. Danger to life due to electric shock or electric arc by touching live components Disconnect the inverter and wait 15 minutes until the capacitors have discharged completely (see Section 5.3, page 65). 2. Check whether all screw connections for the power cabling are tight. In lieu of mechanical torque checks, inspect all power cabling connections using thermal imaging as recommended by NFPA 70B and per ASTM E1934 and/or ISO/AWI Baseline thermal imaging is recommended after initial startup and commissioning for comparisons on an annual basis. If screw connections are loose, tighten them with a torque wrench. 3. Check insulation and connections for discoloration and changed appearance. If insulation and connections are discolored or changed, contact the SMA Service Line. 4. Check the screw connections for damage and contact elements for corrosion. If screw connections are damaged or contact elements are corroded, contact the SMA Service Line. 132 CoMVPP-SH-US_en-20 System Manual

137 8 Maintenance Checking the Surge Arrester Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. Figure 43: Position of the surge arrester (example) Position A Designation Ready indicator of the surge arrester Additionally required maintenance material (not included in the scope of delivery): A testing device approved by the manufacturer of the surge arrester (e.g. the PM20 from DEHN + SÖHNE GmbH + Co. KG.) Procedure: 1. Open the interface cabinet. 2. Check the surge arresters (see the testing device documentation). 3. Check whether the ready indicator of one of the surge arresters is red. If the ready indicator of one of the surge arresters is red, replace the surge arresters. Remove the cables of the surge arrester. Mark the cables. The cables must be reconnected to the same terminals later. Open the terminal and remove the surge arrester upwards out of the DIN rail. System Manual CoMVPP-SH-US_en

138 8 Maintenance SMA America, LLC Insert the new surge arrester into the DIN rail from above and press it against the DIN rail. Connect the cables to the same terminals of the surge arrester from which they were previously removed. 4. Close the interface cabinet. 134 CoMVPP-SH-US_en-20 System Manual

139 8 Maintenance Checking the Safety Messages Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. Inverter without Integrated DC Switch Figure 44: Safety messages on the inverter Position SMA order number Designation A Warning label general SC-US EN Warning label Arc Flash Hazard Protection B Only with order option AC Disconnect: Photovoltaic System AC Disconnect System Manual CoMVPP-SH-US_en

140 8 Maintenance SMA America, LLC Position SMA order number Designation C Warning label Arc Flash D Warning label SC-US external transformer EN E Warning label, burn hazard, hot surface. F Only for order option DC fuses: Warning label SC-US DC fuses EN/ES Only for order option DC fuses: Warning label SC-US DC fuses EN/FR G Type label H Label control supply voltage I For positive grounding: 1,000 V PV For positive grounding: 600 V PV * For negative grounding: 1,000 V PV For negative grounding: 600 V PV+* K ABC 60 Hz L Warning label SC-US conductors, EN-FR Warning label SC-US conductors, EN-ES M Grounding Electrode Terminal N For negative grounding or insulated: 1,000 V PV For negative grounding or insulated: 600 V PV * For positive grounding or insulated: 1,000 V PV For positive grounding or insulated: 600 V PV+* O Warning label SC US capacitors C1-C3, C6 optional EN/FR Warning label SC US capacitors C1-C3, C6 optional EN/ES P Warning label, SC US stack capacitors EN/ES Warning label, SC US stack capacitors EN/FR * For Sunny Central 500CP-US 600V 136 CoMVPP-SH-US_en-20 System Manual

141 8 Maintenance Inverter with Integrated DC Switch Figure 45: Safety messages on the inverter Position SMA order number Designation A Warning label general SC-US EN Warning label Arc Flash Hazard Protection B Label "Closed" C Label "Photovoltaic System AC Disconnect" D Label "DC-Switch" E Label "Open" F Warning label Arc Flash G Warning label SC-US external transformer EN H Warning label Electric Shock due to Live Voltage EN/ES Warning label Electric Shock due to Live Voltage EN/FR System Manual CoMVPP-SH-US_en

142 8 Maintenance SMA America, LLC Position SMA order number Designation I Warning label Burn Hazard K Only for order option DC fuses: Warning label SC-US DC fuses EN/ES Only for order option DC fuses: Warning label SC-US DC fuses EN/FR L Warning label Electric Shock Hazard EN/FR Warning label Electric Shock Hazard EN/ES M Warning label Danger: Do not pull out fuses under load EN/FR Warning label Danger: Do not pull out fuses under load EN/ES N Nameplate O Label control supply voltage P For positive grounding: 1,000 V PV For positive grounding: 600 V PV * For negative grounding: 1,000 V PV For negative grounding: 600 V PV+* Q ABC 60 Hz ABC 50 Hz R Warning label SC-US Conductors, EN-FR Warning label SC-US Conductors, EN-ES S Grounding Electrode Terminal T For negative grounding or insulated: 1,000 V PV For negative grounding or insulated: 600 V PV * For positive grounding or insulated: 1,000 V PV For positive grounding or insulated: 600 V PV+* U Warning label SC US capacitors C1-C3, C6 optional EN/FR Warning label SC US capacitors C1-C3, C6 optional EN/ES V Warning label, SC US stack capacitors EN/ES Warning label, SC US stack capacitors EN/FR * For Sunny Central 500CP-US 600V Procedure: Check whether any safety message or label is damaged or missing. Replace the safety messages and labels if they are damaged or missing. In case of missing or damaged safety messages or labels, contact the SMA Service Line. 138 CoMVPP-SH-US_en-20 System Manual

143 8 Maintenance Maintenance After Connection of the Supply Voltage Safety Danger to life due to electric shock High voltages are present in the conductive components of the inverter. Touching live components results in death or serious injury due to electric shock. Switch the inverter key switch to the Stop position and ensure that the device cannot be accidentally reconnected. After disconnecting the inverter from voltage sources, wait at least 15 minutes for the capacitors of the Sunny Central to discharge completely. Do not touch any live components in the inverter or the medium-voltage grid. Comply with all applicable safety regulations for handling medium-voltage grids. Wear Hazard Risk Category 2 personal protective equipment. Always perform work in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA), NEC, and NFPA 70E Checking the Integrated DC Switch Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. Figure 46: Indicators and switches on the Internal DC Switch Position A B C D Description Spring status indicator (not applicable for these motor driven switches) Position indicator ON button OFF button System Manual CoMVPP-SH-US_en

144 8 Maintenance SMA America, LLC Requirements before proceeding: The inverter is operating without faults or errors. Proceedure: 1. Danger to life due to electric shock or electric arc by touching live components Disconnect the inverter and wait 15 minutes until the capacitors have discharged completely. 2. Open the doors of the inverter cabinet. 3. Reconnect the supply voltage(see Section 5.4, page 72). The internal fan and the inverter bridge fan start up for a short time. The internal fan and inverter bridge fan do not start? Contact the SMA Service Line. Context: The Integrated DC Switch option consists of a control actuator switch on the inverter door, red and green indictor lights on the inverter door, and two motor driven DC load-break switches inside the inverter. This proceedure tests the correct operation of each of these components. Proceedure: 1. Verify that the Integrated DC Switch control actuator switch on the inverter door is in the ON position, and that the green CLOSED indicator light is illuminated. 2. Switch the key switch of the inverter to Stop. 3. Check whether the red OPEN indicator light on the inverter door is illuminated, indicating that the DC load-break switches are open. 4. Open the doors of the interface cabinet. 5. Check whether the DC load-break switches are both indicating the Off position. If either of the DC load-break switches are not indicating the Off position, contact the SMA Service Line. 6. Close the doors of the interface cabinet. 7. Switch the key switch of the inverter to Start. 8. Check whether the green CLOSED indicator is illuminated, indicating that the DC load-break switches are closed. 9. Open the doors of the interface cabinet. 10. Check whether the DC load-break switches are indicating the On position. If the DC load-break switches are not both indicating the On position, contact the SMA Service Line. 11. Switch the Integrated DC Switch control actuator switch on the inverter door to OFF. 12. Check whether the DC load-break switches are both indicating the Off position. If either of the DC load-break switches are not indicating the Off position, contact the SMA Service Line. 13. Check whether the red OPEN indicator light on the inverter door is illuminated, indicating that the DC load-break switches are open. 14. Test the switching process three times. Check each time whether the DC load-break switches have switched. 15. Close the doors of the interface cabinet. 140 CoMVPP-SH-US_en-20 System Manual

145 8 Maintenance Checking the Heating Elements, Hygrostat and Fans Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. Risk of burns due to hot heating elements During the functional test, the heating element becomes hot. There is a risk of burns if you touch the heating element without protective gloves. Do not touch heating elements with bare hands. Wear personal protective equipment. Always maintain a suitable distance when checking the function of the heating elements. Low humidity If humidity is below 50%, you will not be able to perform the function test since the minimum value of the hygrostat is 50%. Figure 47: Positions of the heating element, hygrostat and fans Position A B C Designation Heating element Fans Hygrostat System Manual CoMVPP-SH-US_en

146 8 Maintenance SMA America, LLC Requirement: There are no disturbances. Procedure: 1. Reconnect the supply voltage(see Section 5.4, page 72). The internal fan and the fan of the inverter bridge start up for a short time. The internal fan and fan of the inverter bridge do not start? Contact the SMA Service Line. 2. Set the hygrostat to the minimum value. To do so, pull out the selector switch gently. Tip: the hygrostat is adjusted correctly if the relay of the hygrostat emits an audible click. 3. Check whether the heating elements in the inverter radiate heat after a delay time of five minutes. If the heating elements do not radiate heat, contact the SMA Service Line. 4. Reset the hygrostat to the initial value. The initial value is indicated in the circuit diagram. 5. Disconnect the supply voltage (see Section 5.3.4, page 69) Maintenance when Medium Voltage, Low Voltage, DC Voltage and Supply Voltage are Present Safety Electric shock due to live voltage Some maintenance work and functional tests must be performed when voltage is present. Dangerous contact voltages are present in the MV Power Platform and its devices during this work. Touching live components results in death or serious injury due to electric shock. All work must be carried out in accordance with this document. When working in a high contact-risk environment, wear Hazard Risk Category 2 personal protective equipment. Always perform work in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA), NEC, and NFPA 70E. Do not touch live components. Follow the instructions precisely. Read and comply with the safety messages on the product and in the documentation. Observe all safety precautions (see Section 2.2, page 16). 142 CoMVPP-SH-US_en-20 System Manual

147 8 Maintenance Checking the DC Contactor in Units without the Integrated DC Switch Electric shock due to live voltage Some maintenance work and functional tests must be performed when voltage is present. Dangerous contact voltages are present in the MV Power Platform and its devices during this work. Touching live components results in death or serious injury due to electric shock. All work must be carried out in accordance with this document. When working in a high contact-risk environment, wear Hazard Risk Category 2 personal protective equipment. Always perform work in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA), NEC, and NFPA 70E. Do not touch live components. Follow the instructions precisely. Read and comply with the safety messages on the product and in the documentation. Observe all safety precautions (see Section 2.2, page 16). Figure 48: Position of the DC contactor Position A Designation DC contactor Requirements: Supply voltage is present. DC voltage is present. Procedure: 1. Switch the inverter to Stop. By doing so, the DC contactor is audibly switched off. 2. Open the doors of the interface cabinet. 3. Check the switching state of the DC contactor. The DC contactor is switched off. System Manual CoMVPP-SH-US_en

148 8 Maintenance SMA America, LLC The DC contactor does not switch off? Contact the SMA Service Line. 4. Close the doors of the interface cabinet. 5. Switch the inverter to Start. 6. Open the doors of the interface cabinet. 7. Check the switching state of the DC contactor. The DC contactor is switched off. The DC contactor does not switch off? Contact the SMA Service Line. 8. Switch the inverter to Stop. 9. Test the switching process three times. Check three times whether the DC contactor has switched. 10. Close the doors of the interface cabinet Checking the AC Disconnect Electric shock due to live voltage Some maintenance work and functional tests must be performed when voltage is present. Dangerous contact voltages are present in the MV Power Platform and its devices during this work. Touching live components results in death or serious injury due to electric shock. All work must be carried out in accordance with this document. When working in a high contact-risk environment, wear Hazard Risk Category 2 personal protective equipment. Always perform work in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA), NEC, and NFPA 70E. Do not touch live components. Follow the instructions precisely. Read and comply with the safety messages on the product and in the documentation. Observe all safety precautions (see Section 2.2, page 16). Figure 49: Position of the AC Disconnect 144 CoMVPP-SH-US_en-20 System Manual

149 8 Maintenance Position A B C D Designation OFF button ON button Spring status indicator Position indicator Additionally required maintenance material (not included in the scope of delivery): A testing device approved by the manufacturer of the AC Disconnect, e.g. TT1 from ABB Procedure: Use the testing device to check whether the AC Disconnect is ready for operation (instructions for testing are included in the documentation of the testing device). If a fault occurs during the test, contact the SMA Service Line Reading off the Replacement Interval Meter 1. Log in to the user interface. 2. Enter the password in the appropriate field on the homepage and confirm with [Login]. 3. Select Data > Device. 4. Select. A list of all existing device types appears. 5. Select the device type Sunny Central. A list appears containing all existing devices of this type. 6. Select the desired device from the list. 7. Select the tab Instantaneous values. 8. Check the following meters and compare them with the replacement intervals (see Section 4.1, page 22): Number of GFDI trippings in the instantaneous value CntGfdiTripSw. If replacement of the GFDI is necessary, the error message 7714 will appear on the display. Number of switching cycles of the Remote Switch Unit of the GFDI in the instantaneous value CntGfdiSw. 9. If the corresponding instantaneous value equals or is greater than the replacement interval of the device, replace the device. Contact the SMA Service Line. 8.6 Auxiliary Services Rack Maintenance after Disconnection The tasks described in this section must only be performed when the MV Power Platform is disconnected General Maintenance Perform general maintenance work (see Section 8.4, page 124). System Manual CoMVPP-SH-US_en

150 8 Maintenance SMA America, LLC Checking the Safety Messages Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. 146 CoMVPP-SH-US_en-20 System Manual

151 8 Maintenance Figure 50: Positions of the safety messages Position SMA order number Designation A Warning label, hot surface B Warning label, risk of electrical shock C - Type label System Manual CoMVPP-SH-US_en

152 8 Maintenance SMA America, LLC Position SMA order number Designation D Label, Main disconnect E Warning label, Arc Flash and Shock Hazard F Label, max. 250 W each G - Reference designation H Label, Platform supply - Off - Generator supply I Label, operating the sunshade K - Type label L - Type label Procedure: Check whether any safety message or label is damaged or missing. Replace the safety messages and labels if they are damaged or missing. In case of missing or damaged safety messages or labels, contact the SMA Service Line Checking the Functionality of the Disconnect Switches Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. Required maintenance material (not included in the scope of delivery): A suitable, water-free and heat-resistant lubricant, e.g. WD40 Procedure: Check whether the disconnect switches of the boxes in the Auxiliary Services Rack function correctly. If the disconnect switches can only be switched with difficulty, treat the switch mechanisms with lubricant Checking the Functionality of the Sun Shield 1. Unlock latches. 2. Lift latch T-handles and twist. The sun shield will slightly open to approximately Use the push stick located in the bottom of the Auxiliary Services Rack to push the sun shield to a horizontal position. The mechanical arm locks when reaching this position. 4. Disengage the mechanical arm. Use the push stick to slightly lift the sun shield. Pull the chain attached to the eyebolt to disengage the mechanical arm. Slowly let the sun shield drop to approximately Place the push stick back into the Auxiliary Services Rack. 6. Push the sun shield into the closed position. 7. Twist the T-handles to engage the latches and recess the T-handles. 8. Lock latches. 9. If the correct functioning of the sun shield is not guaranteed, contact the SMA Service Line. 148 CoMVPP-SH-US_en-20 System Manual

153 8 Maintenance 8.7 Disconnect Unit Maintenance after Disconnection The tasks described in this section must only be performed when the MV Power Platform is disconnected General Maintenance Perform general maintenance work (see Section 8.4, page 124) Checking the Bolted Connections of the Power Cabling Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. Risk of fire due to failure to observe torque specifications on live bolted connections Failure to follow the specified torques reduces the ampacity of live bolted connections so that the contact resistances increase. This can cause components to overheat and catch fire. Ensure that live bolted connections are always executed with the exact torque specified in this document. Only use suitable tools when working on the device. Avoid repeated tightening of live bolted connections as this may result in inadmissibly high torques. Damage to the bolted connections through exceeding the permitted torques Tightening bolted connections that have already reached their permitted torque can damage the bolted connections. Only tighten loose bolted connections to the prescribed torque. Torque specifications are indicated in the circuit diagram of the inverter. Contact the SMA Service Line if specifications are missing. Checking the bolted connection of the power cabling The bolted connections of the power cabling only need to be checked if no DC Disconnect Units are used and the connection of the power cabling was made by the customer. System Manual CoMVPP-SH-US_en

154 8 Maintenance SMA America, LLC Figure 51: Customer DC connection points in the Disconnect Units Position Designation A DC input for the grounded terminal of Disconnect Unit 1 B DC input for the ungrounded terminal of Disconnect Unit 1 C PE connection of the Disconnect Units D DC input for the ungrounded terminal of Disconnect Unit 2 E DC input for the grounded terminal of Disconnect Unit 2 Procedure: Check whether all bolted connections for the power cabling are tight. In lieu of mechanical torque checks, inspect all power cabling connections using thermal imaging as recommended by NFPA 70B and per ASTM E1934 and/ or ISO/AWI Baseline thermal imaging is recommended after initial startup and commissioning for comparisons on an annual basis. If bolted connections are loose, tighten them with a torque wrench. Check insulation and connections for discoloration and changed appearance. If insulation and connections are discolored or changed, contact the SMA Service Line. Replace damaged power connections and corroded contact elements Checking the Seal on the Front Panel Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. Required maintenance material (not included in the scope of delivery): A suitable water-free, heat-resistant lubricant Procedure: Check whether the seal on the front panel is damaged. 150 CoMVPP-SH-US_en-20 System Manual

155 8 Maintenance If the seal is damaged, contact the SMA Service Line. Maintain the seal with talcum, petroleum jelly or wax. This prevents frost damage Checking the Functionality of the DC Switches Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. Required maintenance material (not included in the scope of delivery): A suitable, water-free and heat-resistant lubricant, e.g. WD40 Procedure: Check whether the DC switches function correctly. If the DC switches can only be switched with difficulty, treat the switches with lubricant. 8.8 MV Transformer Maintenance after Disconnection The tasks described in this section must only be performed when the MV Power Platform is disconnected General Maintenance Perform general maintenance work (see Section 8.4, page 124). System Manual CoMVPP-SH-US_en

156 8 Maintenance SMA America, LLC Checking the Oil Separator and Oil Tray Figure 52: Position of the oil separator and oil tray Position A B Designation Oil tray Oil separator Required maintenance material (not included in the scope of delivery): Pump Oil separator 4" Petro-Pipe w/1.5" male fitting 16" long, PIT-416 Procedure: 1. Remove the grill above the oil tray. 2. Check whether there is oil present in the oil tray. If there is oil present in the oil tray, pump out the oil using a pump and properly dispose of the oil. If there is no oil in the oil tray, it is not necessary to replace the oil separator. 3. After having pumped out the oil, replace the oil separator. 152 CoMVPP-SH-US_en-20 System Manual

157 8 Maintenance Remove the safety ring. Press the safety ring together and pull upwards. Remove the grill, net, filter pad and oil separator. Rinse the filter pad with water. The water flows easily through the filter pad. The water flows slowly through the filter pad. Clean or replace the filter pad. Clean the hollow space. Insert the new oil separator. Insert the new filter pad. Insert the net and grill. Insert the safety ring. When inserting, press the safety ring together. 4. Insert the grill above the oil tray. System Manual CoMVPP-SH-US_en

158 8 Maintenance SMA America, LLC Cleaning the Oil Tray Behind the Oil Separator Figure 53: Position of the oil separator and oil tray Position A B Designation Oil tray Oil separator Procedure: 1. Remove the grill above the oil tray. 2. Clean the area behind the oil separator extensively. Ensure that the oil separator is not blocked by impurities. 3. Insert the grill above the oil tray Testing the Transformer Oil 1. Take an oil sample and send it to a third party tester to check dissolved gas levels. 2. Compare dissolved gas analysis results to the baseline result. 3. Look for abrupt changes in dissolved gas levels. 4. Check all abrupt changes. 154 CoMVPP-SH-US_en-20 System Manual

159 8 Maintenance Exchanging the Fuses (Green Power Fuses) in the MV Transformer If the fuses fail during internal supply voltage, you can change these in the MV transformer. Disconnect the MV Power Platform at the AC and DC sides. Danger to life through electric shock due to incorrectly disconnected MV Power Platform If the MV Power Platform and its devices are not correctly disconnected, dangerous voltages can be present on the components which result in death or serious injury when touching them. Disconnect the MV Power Platform (see Section 5.3, page 65). Ensure that the MV Power Platform and its devices are voltage-free. Required maintenance material (not included in the scope of delivery): Fuses Mersen AJT100 (SMA order number: ) Procedure: 1. Open the doors of the MV transformer. 2. Change the fuses in the fuse block. 3. Close the doors of the MV transformer Maintaining the MV Transformer Task Exterior Surfaces Inspect for evidence of tampering, battered metal, gouges, etc. Paint or Protective Coatings Inspect for scratches or weathering. Tank Leaks Check tank exterior for signs of a leak. General Location Check the area around the transformer for stored tools, materials, equipment or debris. Gauges and Controls Check for proper operation. Equipment Leaks Inspect drain cocks, plugs, fuse mountings, and switches. Look for evidence of insulating liquid seepage around tank-wall gaskets, seals, etc. Measures Any such damage should be repaired immediately. Any such damage should be touched up immediately. Any such leaks should be repaired immediately. Anything on or against the transformer should be removed. Repair or replace damaged or defective equipment. Repair as required. Replacement of gaskets or seals in the tank wall may require that the tank be opened and the insulating liquid lowered to the appropriate level. For instruction on opening the tank and for draining and replacing the insulating liquid, refer to the Insulating Liquid Maintenance section in the Maintenance Instructions Manual. System Manual CoMVPP-SH-US_en

160 8 Maintenance SMA America, LLC Task Tank Pressure Check that pressure/vacuum gauge does not remain at zero for an extended period of time. Oil Level Check oil level gauge. Fluid Temperature Check liquid temperature gauge for elevated temperature. Reset the drag hand if one exists. Compare temperature to that of similar units to identify units that may be overheating. Cable Connections If there are signs of overheating, check all cables for loose connections and discolorations. Bushings Check condition of the HV and LV bushings. Observe for any indication of dirt, breakage, general damage, heat damage or flashover. Cubicle Padlock Check that all cubicles are locked. LV Bushing Cantilever Check for excessive cable/conductor weight or stiff cable conductors putting upward or downward pressure on the bushings due to pad settling. Pressure Relief Valve Check for dirt, debris and operation. Measures If the pressure/vacuum gauge remains at zero for an extended period of time this may be evidence of air leakage in and out of the tank. A leak test should be performed by adding nitrogen gas to the airspace to a pressure of 2 PSIG, and observing for loss of pressure over an interval of a minimum of 12 hours. If the pressure is lost, locate the leak and repair immediately. If the oil level is below the nominal level, check transformer for signs of a leak. If a leak is observed, repair immediately. If no leak is observed, add oil to bring level to nominal operating level. Refer to the Maintenance Instructions Manual. If temperature is elevated, have transformer serviced immediately to determine source of elevation. Call the SMA Service Line. Tighten any loose connections immediately. If the bushings are dirty, clean them immediately. Any damage that is observed should be addressed immediately by a qualified technician. Replace any missing locks immediately. Immediately adjust cable/conductor position to eliminate pressure. Replace immediately if damaged. Clean if dirty or clogged with debris Adjusting the MV Transformer Tank Pressure If the unit is subjected to significant seasonal temperature changes, the tank pressure in the MV transformer may need to be adjusted to prevent an over-pressure or under-pressure alarm condition. 156 CoMVPP-SH-US_en-20 System Manual

161 8 Maintenance Figure 54: MV transformer gauge box Position A B C D E F G Description Liquid level gauge and alarm contacts Schrader valve Pressure relief valve Vacuum switch with alarm contacts Pressure switch with alarm contacts Liquid temperature gauge with alarm contacts Vacuum pressure gauge Required maintenance material (not included in the scope of delivery): Nitrogen gas tank with regulator, hose, Schrader valve nozzle. Procedure: 1. Locate and open the gauge box on the exterior of the MV transformer. 2. Observe the MV transformer liquid temperature and pressure gauges. If the pressure is zero, the tank may have a leak (see Section , page 155) 3. Use this table to determine the nominal pressure based on the liquid temperature. Liquid Temperature ( C) Nominal Tank Pressure (PSIG) < 21-1 to 0 21to to to to to to 80 5 > 80 6 If the pressure is too high, lower the pressure by releasing gas through the pressure relief valve. System Manual CoMVPP-SH-US_en

162 8 Maintenance SMA America, LLC If the pressure is too low, add nitrogen gas through the Schrader valve. 4. To lower the tank pressure: With a rag in hand, pull the ring on the pressure relief valve. Let gas escape until the tank pressure reaches the target value. 5. To raise the tank pressure: Set the regulator on the nitrogen gas tank to 8 PSIG. Apply the nozzle to the Schrader valve until the tank pressure reaches the target value. 6..Verify that the tank pressure in now within the acceptable range 7. Close the gauge box cover. 158 CoMVPP-SH-US_en-20 System Manual

163 9 Periodic Actions 9 Periodic Actions Individual paragraphs in this Section are periodic actions that need to be carried out when working on the MV Power Platform. These actions do not need to be carried out in the given order. 9.1 Assembling and Disassembling Removing and Mounting the Protective Covers Some assemblies in the inverter and the Disconnect Unit are equipped with protective covers. Figure 55: Position of the protective covers in the inverter Position A Designation Protective cover System Manual CoMVPP-SH-US_en

164 9 Periodic Actions SMA America, LLC Figure 56: Position of the protective covers in the Disconnect Unit Position A Designation Protective cover in front of the grounded terminal Removing the protective cover: Unscrew the protective cover in front of the corresponding assembly. Mounting the protective cover: Tighten the protective cover in front of the corresponding assembly with the indicated torque: Protective cover Protective covers in the inverter and in the Disconnect Unit (without cover in front of the AC main switch of the inverter) Cover in front of the AC main switch of the inverter Torque 88.5 in-lb. (10 Nm) 26.5 in-lb. (3 Nm) 160 CoMVPP-SH-US_en-20 System Manual

165 9 Periodic Actions Working on the Inverter Removing the Panels To insert the cables in the inverter and to connect them, you must remove the panels of the connection area at the inverter. Property damage due to rupture of grounding cables The panels are connected to the inverter via grounding cables. When removing the panels, make sure not to damage the grounding cables. Procedure: 1. Remove the panel screws of the connection area using a Torx screwdriver (T30). 2. Carefully pull the front panel of the connection area approximately 3 in. to 4 in. (80 mm to 100 mm) towards the front. 3. Detach the grounding straps from the rear side of the panels. 4. Remove the panels Mounting the Panels 1. Make sure that all cables are attached to the cable support rails with cable ties. 2. Position the panels on the inverter. 3. Tighten the grounding straps at the panels of the interface cabinet (torque: 124 in.-lb. (14 Nm)). 4. Make sure that the grounding straps are securely connected. 5. Tighten the panels to the inverter using a Torx screwdriver (torque: 53 in.-lb. (6 Nm)). System Manual CoMVPP-SH-US_en

166 9 Periodic Actions SMA America, LLC Working on the Disconnect Unit Removing the Front Plate The front of the Disconnect Unit consists of an individual front plate that is secured with screws to the enclosure of the Disconnect Unit. Risk of injury due to heavy and bulky front plate of the Disconnect Unit The front plate of the Disconnect Unit is heavy and bulky. If you try to remove and move the front plate on your own, you run a risk of limbs being crushed. Note the weight of the front plate of the Disconnect Unit. Two persons are needed to move the front plate of the Disconnect Unit. Ensure that one person is holding the front plate at all times when the other person is working on it. Property damage due to rupture of grounding cables The panels are connected to the inverter via grounding cables. When removing the panels, make sure not to damage the grounding cables. Requirement: The MV Power Platform must be disconnected (see Section 5, page 62). Procedure: 1. Remove the three screws on the switch levers on the left-hand side of the front plate. 2. Turn all switch levers of the Disconnect Unit to the left into the OFF position. 162 CoMVPP-SH-US_en-20 System Manual

167 9 Periodic Actions 3. Remove all screws except for the four screws at the corners of the front plate. 4. Hold the front plate of the Disconnect Unit and remove the four screws at the corners of the front plate. 5. Pull the bottom edge of the front plate approximately 6 in. (150 mm) to the front. 6. Unhinge the front plate from the enclosure at the top edge. Lift the front plate. 7. Pull the front plate forwards by around 8 in. (200 mm) and hold with two hands. System Manual CoMVPP-SH-US_en

168 9 Periodic Actions SMA America, LLC 8. Remove the grounding strap from the bottom left corner of the front plate. 9. Remove the front plate Mounting the Front Plate Risk of injury due to heavy and bulky front plate of the Disconnect Unit The front plate of the Disconnect Unit is heavy and bulky. If you try to mount and move the front plate on your own, you run a risk of limbs being crushed. Note the weight of the front plate of the Disconnect Unit. Two persons are needed to move the front plate of the Disconnect Unit. Ensure that one person is holding the front plate at all times when the other person is working on it. Requirement: The MV Power Platform must be disconnected (see Section 5, page 62). Procedure: 1. Turn all switch levers on the removed front plate to the OFF position. 2. Attach the terminal brackets of the enclosure from the sides to the correct position between in. and 1 ft in. (300 mm to 400 mm). 3. Secure the front plate using two hands and hold it against the front of the Disconnect Unit. The distance between the Disconnect Unit and the front plate must be approximately 8 in. (200 mm). 164 CoMVPP-SH-US_en-20 System Manual

169 9 Periodic Actions 4. Tighten the grounding strap of the Disconnect Unit at the bottom left corner of the front plate (torque: 70 in.-lb. (8 Nm)). 5. Hook the front plate into the two terminal brackets at the upper edge of the enclosure. 6. Press the lower edge of the front plate onto the Disconnect Unit. 7. Carefully shake the individual switch levers several times so that the shafts of the individual switches lock into place in the switch levers. System Manual CoMVPP-SH-US_en

170 9 Periodic Actions SMA America, LLC 8. Slightly screw the front plate with four screws and four washers to the corners of the Disconnect Unit. Thus, it is still possible to align the front plate. 9. Insert eleven screws with washers in the drill holes that can be accessed and slightly tighten them. The three drill holes below the switch levers at the left-hand side of the front plate cannot be accessed. 10. Make sure that the front plate is aligned at the corners of the Disconnect Unit. Tighten all screws (torque: 44 in.-lb. (5 Nm)). 11. Make sure that all switch levers can be turned in the positions ON and OFF. The switch levers can be switched without backlash making an audible sound. The switch levers can only be switched with backlash or make an unusual sound? Realign the front plate and tighten it again. 12. If all switch levers can be correctly switched, turn all switch levers to the ON position. 13. Tighten the three screws with the washers in the drill holes at the switch levers on the left-hand side of the front plate (torque: 44 in.-lbs. (5 Nm)). 14. Switch all switch levers to the OFF position. 166 CoMVPP-SH-US_en-20 System Manual

171 9 Periodic Actions 9.2 Cable Entry Inserting the Cables through the Base Plates Damage to the devices due to moisture penetration Moisture and water penetration can damage the devices of the MV Power Platform or impair their functionality. The openings must not be too large so that they can be sealed easily. Use fittings and conduits to seal all openings as required by the National Electrical Code ANSI/NFPA 70. Procedure: 1. Cut the conduits to length to the base plates. 2. Attach the conduit fittings to the conduits. 3. Lead the conduit fittings of the conduits through the base plate. 4. Lead the cables through the conduits into the prepared holes of the base plate. 5. Mount the base plates (torque: 17 ft.-lb. (23 Nm)). 6. Secure the conduit fittings of the conduits to the base plates using counter nuts. 7. Seal all conduit fittings and conduits. This will prevent dust and moisture intrusion. 8. If the installation is not to be continued on the same day, the device must be closed. Panels must also be mounted in the inverters (see Section , page 161). System Manual CoMVPP-SH-US_en

172 9 Periodic Actions SMA America, LLC 9.3 Bolted Connections Connecting the Grounding Cable and DC Cable with One Two-Hole Terminal Lug When carrying out the individual actions, always observe the safety precautions described in the Section 4.1 "Safety during Installation". Overview of the Connection with One Two-Hole Terminal Lug Figure 57: Assembly of the connection with one two-hole terminal lug Position A B C D E F Designation Nut M12 Spring washer Fender washer Copper bar Tin-plated two-hole terminal lug Screw M12 Requirements: All cable requirements must be complied with. The cables must be routed into the corresponding device via conduits. The panels in the connection area of the inverter must be removed (see Section , page 161). The protective covers in the connection area of the inverter must be removed (see Section , page 161). 168 CoMVPP-SH-US_en-20 System Manual

173 9 Periodic Actions Additionally required mounting material (not included in the scope of delivery): Clean cloth Ethanol cleaning agent Non-woven abrasive Procedure: 1. Strip the cable insulation. 2. Fit the cables with terminal lugs. 3. Clean the contact surfaces using a clean cloth and ethanol cleaning agent. 4. Clean the contact surfaces of the areas that are not tin-plated with the non-woven abrasive until they have a light metallic sheen. Ensure that the coated contact surfaces are not damaged. 5. Remove metal dust with a clean cloth and ethanol cleaning agent. 6. Do not touch the contact surfaces after cleaning. 7. Connect the cables with the specified torque in accordance with the circuit diagram. Only use the screws, nuts and washers included in the scope of delivery and make sure that the screw heads always point forwards. Type of terminal lug Tin-plated aluminum terminal lug Tin-plated copper terminal lug Aluminum terminal lug on tin-plated aluminum bar Copper terminal lug on tin-plated aluminum bar Torque 27.5 ft.-lb. (37 Nm) 44.5 ft.-lb. (60 Nm) 27.5 ft.-lbs. (37 Nm) 27.5 ft.-lbs. (37 Nm) 8. Secure the cables at the cable support rails. 9. If other cables are not installed immediately afterwards, mount the front panel of the Disconnect Unit (see Section ). System Manual CoMVPP-SH-US_en

174 9 Periodic Actions SMA America, LLC Connecting the Grounding Cable and DC Cables with Two Two-Hole Terminal Lugs Connection Overview with Two Two-Hole Terminal Lugs Figure 58: Design of the connection with two two-hole terminal lugs Position A B C D E F Designation Nut M12 Spring washer Fender washer Tin-plated two-hole terminal lug Copper bar Screw M12 Requirements: All cable requirements must be complied with. The cables must be routed into the corresponding device via conduits. The panels in the connection area of the inverter must be removed (see Section , page 161). The protective covers in the connection area of the inverters must be removed (see Section , page 161). Additionally required mounting material (not included in the scope of delivery): Clean cloth Ethanol cleaning agent Non-woven abrasive 170 CoMVPP-SH-US_en-20 System Manual

175 9 Periodic Actions Procedure: 1. Strip the cable insulation. 2. Fit the cables with terminal lugs. 3. Clean the contact surfaces using a clean cloth and ethanol cleaning agent. 4. Clean the contact surfaces of the areas that are not tin-plated with the non-woven abrasive until they have a light metallic sheen. Ensure that the coated contact surfaces are not damaged. 5. Remove metal dust with a clean cloth and ethanol cleaning agent. 6. Do not touch the contact surfaces after cleaning. 7. Connect the cables with the specified torque in accordance with the circuit diagram. Only use the screws and nuts included in the scope of delivery. Type of terminal lug Tin-plated aluminum terminal lug Tin-plated copper terminal lug Torque 27.5 ft.-lb. (37 Nm) 44.5 ft.-lb. (60 Nm) 8. Secure the cables at the cable support rails. 9. If other cables are not installed immediately afterwards, mount the front panel of the Disconnect Unit (see Section , page 164). 9.4 Clamp Connections Connecting the Cables to the Spring-Cage Terminals 1. Das Kabel 2.4 in. (60 mm) abmanteln. 2. Strip 0.2 in. (5 mm) off the conductor insulation. 3. Connect the cable in accordance with the circuit diagram. Insert the screwdriver into the square-shaped opening next to the terminal. This will unlock the terminal. Insert the insulated conductors of the cable in the terminal in accordance with the circuit diagram. System Manual CoMVPP-SH-US_en

176 9 Periodic Actions SMA America, LLC Pull the screwdriver out of the terminal Connecting the Cable Shield Using a Shield Clamping Saddle If the MV Power Platform is not fitted with an Auxiliary Services Rack, you will need to connect the data and supply cables in the inverter. You must connect the cable shields to the shield clamping saddles. Cable requirement: The cable used must be shielded. Requirement: No voltage must be present on the MV Power Platform. Procedure: 1. Lead the cable into the interface cabinet (see Section 9.4.1, page 171). 2. Connect the cable in accordance with the circuit diagram. 3. Remove the shield clamping saddle from the busbar. 4. Position the shield clamping saddle on the stripped cable until it clicks into place, and fasten hand-tight. Make sure that the shield clamping saddle is in contact with the cable shield. 5. Attach the cable to the cable support rail using a cable tie. This ensures that the cable cannot be pulled out. 172 CoMVPP-SH-US_en-20 System Manual

177 9 Periodic Actions 9.5 Settings on the User Interface of the Inverter Logging Into the User Interface The default password for the user groups "Installer" and "User" is "sma". Identical passwords for the user groups If your "User" password is the same as your "Installer" password, you will automatically be logged in as an installer. Change the default passwords for the user groups after you log in for the first time (see Section 6.2.5, page 81). Requirement: JavaScript must be enabled in your Internet browser (e.g. Internet Explorer). Procedure: 1. Connect the laptop to the service interface of the inverter. 2. Start your Internet browser. 3. Enter the IP address of the inverter into the address bar and press the enter key. 4. Select the desired language in the Language field. 5. Enter the password in the Password field. 6. Select the button [Login] Logging Out of the User Interface Always log out from the user interface when you have finished your work. If you only close the Internet browser, you will not be logged out of the user interface. Procedure: Select the button [Logout] Accessing the Parameter Overview 1. Log into the user interface as an installer (see Section 9.5.1, page 173). 2. Select Data > Devices. 3. Select the desired device. 4. Select the tab Parameters Saving Parameter Changes Requirement: You must be logged into the user interface (see Section 9.5.1, page 173). Procedure: 1. Change the respective parameter via the Value field. 2. To adopt this value for all devices of the same type and with the same firmware version, activate the box Save for all devices of this device type. 3. Select the button [Save]. The communication interface adjusts the required value on the device(s). When the value is changed, the message "### Parameter change finished ###" appears. 4. Select the button [OK]. System Manual CoMVPP-SH-US_en

178 9 Periodic Actions SMA America, LLC 9.6 Entering the Installer Password via Touch Display Installer access The "Installer" access level is activated by entering the installer password. The access level will be reset after 15 minutes. Procedure: 1. Select. 2. Select. 3. Enter the installer password. Use the keypad to do this. 4. Confirm entry by selecting. The symbol appears in the status info line. The status info line does not show the symbol? An incorrect password was entered. Enter the password again. 174 CoMVPP-SH-US_en-20 System Manual

179 10 Product Description 10 Product Description This section will give you an overview of the design and function of the MV Power Platform and its devices Overview of the MV Power Platform The MV Power Platform is a complete solution for large-scale PV power plants. All devices required to convert the direct current generated by the PV modules into alternating current and to feed this into the medium-voltage grid are located on the MV Power Platform. The MV Power Platform is based on a modular concept in which you can select the devices according to the specific project requirements. Principle with Sunny Central CP-US and Disconnect Unit Figure 59: Principle of a large-scale PV power plant with Sunny Central CP-US (example) Position A B C D E F G H I Designation PV array DC combiner boxes (e.g., Sunny Central String-Monitor US) Disconnect Unit Inverter MV transformer Auxiliary Services Rack Communication Auxiliary loads Medium-voltage grid System Manual CoMVPP-SH-US_en

180 10 Product Description SMA America, LLC Principle with Sunny Central CP-US without Disconnect Unit Figure 60: Principle of a large-scale PV power plant with Sunny Central CP-US (example) Position A B C D E F G H Designation PV array DC combiner boxes (e.g., Sunny Central String-Monitor US) Inverters MV transformer Auxiliary Services Rack Communication Auxiliary loads Medium-voltage grid 10.2 Design of the MV Power Platform Subject to the individual order, the MV Power Platform is equipped with two inverters, two Disconnect Units, one Auxiliary Services Rack and one MV transformer. The MV Power Platform is a fully integrated, turnkey solution which is cabled and tested at the factory. The MV Power Platform can be erected on concrete piers, a concrete pad, grade beam or on a compacted gravel bed, and is suitable for installation in all regions of North America. Underneath each individual device on the MV Power Platform there are removable base plates to which conduits can be mounted. The conduits protect the cables when they are inserted into the devices. When connecting the communication and carrying out maintenance work, it is important to distinguish between inverter 1 and inverter CoMVPP-SH-US_en-20 System Manual

181 10 Product Description MV Power Platform with DC Disconnect Unit Figure 61: Design of the MV Power Platform with Disconnect Unit Position Designation A MV transformer B Sunny Central 1 C Sunny Central 2 D Disconnect Unit 1 E Disconnect Unit 2 F Auxiliary Services Rack G Base frame System Manual CoMVPP-SH-US_en

182 10 Product Description SMA America, LLC MV Power Platform without DC Disconnect Unit Figure 62: Design of the MV Power Platform without Disconnect Unit Position Designation A MV transformer B Sunny Central 1 C Sunny Central 2 D Auxiliary Services Rack E Base frame 178 CoMVPP-SH-US_en-20 System Manual

183 10 Product Description 10.3 Devices of the MV Power Platform Sunny Central Design and Function of the Sunny Central CP-US The Sunny Central is a PV inverter that converts the direct current generated in the PV arrays into grid-compliant alternating current. The inverter can be controlled via the Sunny Central Communication Controller. The grid management service specifications from the grid operator can be implemented via a Power Reducer Box or the SMA Power Plant Controller. Figure 63: Design of the Sunny Central CP-US (example) Position A B C D E F Designation Inverter cabinet Interface cabinet Touch display Key switch Service interface Integrated AC Disconnect* *Optional Sunny Central Communication Controller The Sunny Central Communication Controller (SC-COM) is the central communication interface of the inverter. The SC-COM establishes the connection between the inverter and its operator. The SC-COM collects all data from the connected devices. The user interface enables monitoring, parameterization and remote diagnosis of the inverter via computer, as well as power control by the grid operator. Type of communication of the PV system The interface of the SC-COM is set by default to COM3 and the RS485 baud rate to 115 kbd. Do not modify these settings Integrated AC Disconnect Depending on the order option, the Sunny Central CP-US may be fitted with an integrated AC Disconnect. The integrated AC Disconnect unit enables you to disconnect the inverter on the AC side for service and maintenance work and in case of emergency, as stipulated by the National Electrical Code System Manual CoMVPP-SH-US_en

184 10 Product Description SMA America, LLC Disconnect Unit The Disconnect Unit is used to disconnect the MV Power Platform from the PV arrays for service and maintenance work and in case of emergency, as stipulated by the National Electrical Code The internal cabling of the Disconnect Unit 1 and Disconnect Unit 2 differs due to the arrangement on the MV Power Platform. Figure 64: Disconnect Unit Position A Designation Switch for the DC inputs 180 CoMVPP-SH-US_en-20 System Manual

185 10 Product Description MV Transformer The MV transformer is the link between the inverters and the medium-voltage grid. The MV transformer is equipped with a disconnection device on the low and medium-voltage side, enabling simple and safe disconnection. You can find further information on the MV transformer in the Technical Description document "SC_CoMVPP 3w Trafo-TD-EN-10" at Figure 65: Design of the MV transformer Position A B C D E F G H I K L M N O P Designation Liquid level gauge and alarm contacts Pressure relief valve Vacuum switch with alarm contacts Pressure switch with alarm contacts Liquid temperature gauge with alarm contacts Vacuum pressure gauge Fuse holders / fuses, oil immersed expulsion (for MV < 23 kv) Tap changer Primary (MV) bushings Secondary (LV) bushings Fuse block (for LV distribution) Grounding busbars Drain valve in lockable enclosure Alarm contact terminals Medium-voltage load-break switch (lockable) System Manual CoMVPP-SH-US_en

186 10 Product Description SMA America, LLC Auxiliary Services Rack The Auxiliary Services Rack enables the connection of supply voltage, communication and control systems. The disconnect units on the boxes enable simple and safe disconnection of the supply voltages from the MV Power Platform or, if configured, the array tracker motor circuits. The Auxiliary Services Rack is protected from solar irradiation by a sun shield. The push stick to open the sun shield is located at the bottom of the Auxiliary Services Rack in front of the transformers. Depending on the specific order, the Auxiliary Services Rack is equipped with various devices: Figure 66: Auxiliary Services Rack Position Designation Description A Customer-specific box This space is reserved for a customer-specific box in which additional devices may be installed. B Brown Power Box Fusing of the inverter when operated with an external supply voltage C Inverter Box Supply voltage for Sunny Central CP-US D Outlets Two outlets each with 120 V and 250 W for connecting external devices E Pull Box All cables for supply voltage, communication and control systems to be connected in the Main Box or Tracker Box must be routed into the Auxiliary Service Rack through the interface gland plate of the Pull Box. F Generator inlet The Tracker Box is equipped with a generator inlet for the external voltage supply of the solar trackers. G Tracker Box Supply voltage of the solar trackers with up to eight outputs and max. 30 kva H Main Box Terminals for the supply voltage of 120 V devices, communication and control systems 182 CoMVPP-SH-US_en-20 System Manual

187 10 Product Description 10.4 Operating and Display Elements Position of the Switches This section describes the position of the main switches on various devices of the MV Power Platform Key Switch on the Inverter The key switch is used to switch the inverter on and off. Figure 67: Position of the key switch (using the Sunny Central CP-US as an exemple) Position A B Designation Switch position "Start" Switch position "Stop" Switch Position "Start" If the key switch is turned to Start, a motor drive automatically switches the DC switching device on and the Sunny Central switches from the operating state "Stop" to the operating state "Grid monitoring". Providing that there is sufficient irradiation and a valid utility grid connection, the Sunny Central switches to feed-in operation. If there is insufficient irradiation and the input voltage is therefore too low to initiate start-up, the Sunny Central remains in the operating state "Grid monitoring". Switch Position "Stop" If the key switch is turned to Stop while the Sunny Central is in the operating state "Grid monitoring", a motor drive switches the DC switching device off. The Sunny Central switches to the operating state "Stop". If the key switch is turned to Stop while the Sunny Central is in the operating state "MPP load operation", the Sunny Central switches to the operating state "Shutdown". Once shutdown is complete, the AC contactor and the DC switching device open automatically and the Sunny Central switches to the operating state "Stop". System Manual CoMVPP-SH-US_en

188 10 Product Description SMA America, LLC Switch on the AC Disconnect in Sunny Central CP-US Depending on the order option, the Sunny Central CP-US may be fitted with an integrated AC Disconnect. The integrated AC Disconnect is used to disconnect the inverter from the AC grid in case of emergency and for performing service and maintenance work. Figure 68: Switch on AC Disconnect Position A B C D Designation OFF button ON button Position indicator Spring status indicator Switches on the Disconnect Unit The DC Disconnect enables you to disconnect the inverter from the PV array in case of emergency and for service and maintenance work. Figure 69: DC switches on the Disconnect Unit Position DC switch Home run number A DC switch 1 Home run 1 and 2 B DC switch 2 Home run 3 and CoMVPP-SH-US_en-20 System Manual

189 10 Product Description Position DC switch Home run number C DC switch 3 Home run 9 D DC switch 4 Home run 7 and 8 E DC switch 5 Home run 5 and Switches on the Auxiliary Services Rack Using the switches on the optional Auxiliary Services Rack, you can disconnect the supply voltage of various devices on the MV Power Platform. Figure 70: Connection points on the Auxiliary Services Rack Position Designation Explanation A Switch of the Inverter Box* Disconnects the supply voltage from the inverter B Switch of the Brown Power Box* Disconnects the MV Power Platform from the external supply voltage C Switch of the Main Box Disconnects all 208 V / 120 V components from the Auxiliary Services Rack, e.g. communication devices, outlet and customer-specific boxes. D Switch of the Tracker Box* Disconnects the voltage supply to the external tracker motors *optional System Manual CoMVPP-SH-US_en

190 10 Product Description SMA America, LLC Switches on the MV Transformer The medium-voltage load-break switch enables the operator to disconnect the MV Power Platform from the medium-voltage grid. Position A Designation Medium voltage load-break switch Touch Display of the Sunny Central Description of the Touch Display The touch display of the Sunny Central is used to display instantaneous values and parameter settings. The touch display is fitted with a cover to protect it from weather influences. This cover can be pushed up to read the display. The display area is activated by touching the touch display. Tapping the symbols on the touch display activates the corresponding function. If the touch display is not touched for five minutes, it will switch off. You cannot set any inverter parameters on the touch display, but only configure display settings such as language, time, brightness (see Section 6.1, page 79). You can also display the operating data (see Section 6.4.1, page 90). The touch display is divided into three areas. Figure 71: Touch display areas Object A Designation Status info line 186 CoMVPP-SH-US_en-20 System Manual

191 10 Product Description Object B C Designation Information area Navigation line Explanation of Symbols Status Info Line Figure 72: Structure of the status info line Object A B C Designation Number of the active menu Symbol indicating whether the inverter is currently password-protected or is free for configuration Date and time display Information Area - Main Menu You can access the following sub-menus and screens from the main menu: Symbol Designation Explanation E-today line graph Select this symbol to see the energy fed-in on the current day in kwh. Bar chart DC side Select this symbol to see the energy fed in over the last 14 days in kwh. Select this symbol to see the following instantaneous values: PV power in W Insulation resistance in Ω PV current in A PV voltage in V The page which opens also contains the symbol. Select this symbol to see the diagrams on the sub-menu level. System Manual CoMVPP-SH-US_en

192 10 Product Description SMA America, LLC Symbol Designation Explanation Switch on DC or AC side closed Switch on DC or AC side open Status of switches on DC or AC side unknown Inverter data AC side Grid If you see this symbol between the "DC side" symbol and the "Inverter data" symbol, the DC contactor is closed. If you see this symbol between the "Inverter data" symbol and the "AC side" symbol, the AC contactor is closed. If you see this symbol between the "DC side" symbol and the "Inverter data" symbol, the DC contactor is open. If you see this symbol between the "Inverter data" symbol and the "AC side" symbol, the AC contactor is open. If you see this symbol between the "DC side" symbol and the "Inverter data" symbol, the switch status of the DC contactor is not known. If you see this symbol between the "Inverter data" symbol and the "AC side" symbol, the switch status of the AC contactor is not known. Select this symbol to see the following data: Device type Operating state Symbol for utility grid menu Symbol for temperature display Symbol for fan display Select this symbol to see the following instantaneous values: Active power in W Reactive power in VAr Power frequency in Hz Alternating current in A AC voltage in V Select this symbol to see the following data on the first page of the menu: Active procedure for active power limitation (see Section , page 207) Target active power in kw Actual active power in kw Select to see the following data on the second page of the menu: Active procedure for reactive power setpoint (see Section , page 210) Target reactive power in VAr Target displacement power factor cos phi Target excitation type of the displacement power factor Actual reactive power in VAr Actual displacement power factor cos phi Actual excitation type of the displacement power factor 188 CoMVPP-SH-US_en-20 System Manual

193 10 Product Description Information Area - Settings Menu To access the settings menu, press the required symbol in the navigation bar. Symbol Designation Explanation Language selection Select this symbol to open the language selection menu (see Section 6.1.1, page 79). Brightness setting Select this symbol to open the brightness setting menu (see Section 6.1.4, page 79). Time setting Select this symbol to open the time setting menu (see Section 6.1.2, page 79). Format selection Select this symbol to open the format selection menu (see Section 6.1.3, page 79). Password entry Select this symbol to open the password entry menu (see Section 9.6, page 174). Information Area - Diagrams on the Main Menu Level and Sub-Menu Level Number of the active menu Data displayed 103 Energy fed in by the inverter on the current day 104 Energy fed in by the inverter over the last 14 days Navigation Line Symbol Designation Explanation Back Select this symbol to go back to the previous page. Homepage Settings Information Select this symbol to go to the homepage. Select this symbol to access the following symbols: - Language selection - Brightness setting - Time setting - Format selection - Password entry Select this symbol to see the following information: OS: version of the operating system App.: version of the application software Language: selected language Ser.No.: inverter serial number System Manual CoMVPP-SH-US_en

194 10 Product Description SMA America, LLC Symbol Designation Explanation Errors User Interface of the Sunny Central Structure Service This symbol appears when an error occurs. The symbol is displayed once in the symbol of the PV system section where the error has occurred and again in the menu bar. Select this symbol from the menu bar to see the following data: ErrNo: error number TmsRmg: time until reconnection Msg: error message Dsc: corrective measure The "telephone" symbol appears when you are advised to contact the SMA Service Line. The "tool" symbol appears when you are advised to have the error corrected by your installer. Contact your installer. Via the user interface, you can set the communication of your PV system devices, configure the inverter parameters and read off error messages and operating data. Figure 73: Structure of the user interface (example) Position Designation A Structure view or device view(see Section , page 191) B Status bar C Logout button D Navigation bar E Content area 190 CoMVPP-SH-US_en-20 System Manual

195 10 Product Description Structural View and Device View You can call up data of the individual devices of your PV system in the tree view or the device view. Depending on which view you have selected, the devices are sorted differently. Structural View In the tree view, the user interface shows the devices in the order in which they are connected to the data bus. Device View In the device view, the user interface shows all devices sorted by device type. Device types are, for example, all Sunny Centrals. The number shown in parentheses indicates the number of devices in a device type. Status Symbols Depending on the status of the device communication, the device symbols are displayed in the tree or device view with various status symbols. Symbol Explanation The inverter is now ready for operation. There is an error in the inverter. An error has occurred in the communication with the inverter. or It is nighttime and the inverter is not feeding in. System Manual CoMVPP-SH-US_en