Power Distribution Protection & Automation Equipment

Transcription

1 Shinsung Industrial Electric Co., Ltd. Your Source for Power Distribution Protection & Automation Equipment 1

2 01 About Shinsung Providing dependable electrical power distribution worldwide. Shinsung has its own designs and full capacities to manufacture equipment for electric power distribution systems, as well as a variety of models of fault interrupting devices and switchgears, providing dependable electrical power distribution worldwide. The products of Shinsung are overhead line reclosers, overhead and pad mounted load break switches, pad mounted ring main circuit breakers, pole mounted sectionalizers, automatic source transfer circuit breaker, microprocessor-based relays, and RTU-based switchgear controls. In addition to the finished products, Shinsung also develops and manufactures most parts and components to ensure the best product quality. Main Products in Line VIT Self-Healing System Ring Main Circuit Breakers Polymer/SF6 Load Break Switch for overhead lines GIS(Gas-Insulated Switchgear) Polymer/SF6 Auto Circuit Recloser for overhead lines HSSB (Automatic source transfer S/W plus circuit breaker) Fused Vacuum Switch for Customer & Main Line Protection Fuse Cut Out Switch Polymer/SF6 Load Break Switches for underground lines 2 Shinsung Industrial Electric Co., Ltd

3 Shinsung Industrial Electric Co., Ltd. 02 How to Contact Shinsung Head Office & Manufacturing Facility 143, Yeonam-ro, Seonghwan-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do, Republic of Korea Tel Fax Website Head Office & Manufacturing Facility Digital R&D Center #301, 3F, 25, Hwarang-ro 1-gil, Seongbuk-gu, Seoul, Republic of Korea Tel Fax SPGAS 15 kv Load Break Switch Quality and environment management Quality assurance and quality control are of the utmost importance to Shinsung. All our equipment has been designed in accordance with the latest Korean Industrial Standards (KS), IEC and ANSI/IEEE. Shinsung gained ISO 9001 certification in 1995 and ISO certification. From the start of manufacturing to final inspection, product quality is strictly monitored to ensure that the most stringent requirements of ISO 9001 (2008) and ISO (2008) are met. Reliability and durability are engineered into every Shinsung product. Rigorous inspection procedures ensure high quality manufacturing and high performance in each application. All of Shinsung s operations include recognized quality procedures and use feedback mechanisms that identify potential problems. Shinsung designed all the devices by itself without technical licenses from other companies. ISO 9001:2008 Overhead line reclosers, overhead and pad mounted load break switches, pad mounted ring main circuit breakers, pole mounted sectionalizers, automatic load transfer switches, fuse cutouts, air insulated load break switches for indoor use, microprocessor-based relays, and RTU-based switchgear controls are the main products of Shinsung. Shinsung has been pioneering the introduction of new technology in the field of power distribution equipment and systems. Shinsung manufactures a variety of models of fault interrupting and switching products, providing dependable electrical power distribution to millions of people worldwide. ISO

4 03 Timelines Since its founding, Shinsung has pioneered the development of new technologies and trends in the power distribution automation industry of Korea Founded Shinsung Industrial Electric Co., Ltd, power distribution equipment manufacturing facility, and R&D Center in Suwon City, Korea. Developed 12 kv 630 A 20 ka Gas-Insulated Vacuum Interrupting Ring Main Circuit Breaker for SCADA Developed 25.8 kv 600 A Gas-Insulated Pole Mounted Load Break Switch, and started to supply Pole Mounted Load Break Switches internationally through Nulec Industries Pty., Ltd (Schneider Electric Group), Australia Developed 25.8 kv 600 A Gas Insulated Pad Mounted Load Break Switch for feeder automation and microprocessor control for Distribution Automation Systems Developed 25.8kV SF6 Gas-Insulated Sectionalizer for SCADA Developed 25.8kV 630A SF6 Gas-Insulated Vacuum Interrupting Recloser for SCADA. Supplied 25.8kV 630 A 12.5 ka Gas-Insulated Vacuum Interrupting Ring Main Circuit Breaker for SCADA to KEPCO Developed 25.8 kv 630 A SF6 Gas-Insulated Vacuum Interrupting Recloser for SCADA. Supplied 25.8 kv 630 A 12.5 ka Gas-Insulated Vacuum Interrupting Ring Main Circuit Breaker for SCADA to KEPCO Developed 25.8 kv 600 A Gas-Insulated Pad Mounted Load Break Switch for SCADA. Started to supply Reclosers and Pole Mounted Load Break Switches ( RAPIER GX 15, 27, 38 ) through Lucy Switchgear, UK Signed Technical License Agreement with Chung-Hsin (CHEM), in Taiwan and Thai Maxwell in Thailand Developed Automatic Sectionalizing Circuit Breaker Developed Automatic Sectionalizing LBS(Load Break Switch) 2007 Developed GIS (Gas-Insulated Substation) for 24 kv system Solid Insulated Pole Mounted Switch 2013 Solid insulation source transfer circuit breaker Solid insulation automatic circuit recloser 2014 Solid insulation Fused Vacuum switch 2015 Ring main switch for Middle East, Asia 2016 Pole Top Circuit Breaker for Customer protection Single-phase Automatic Circuit Recloser Polymer Pad Mounted Circuit Breaker 4 Shinsung Industrial Electric Co., Ltd

5 Shinsung Industrial Electric Co., Ltd. 04 Certificates Certificate of Business Registration ISO 9001(2008) ISO 14001(2004) Certificate of Trade Business Certificate of Research Institute Polymer pad mounted Load Break Switch Polymer Load Break Switch for overhead line High speed section Circuit Breaker INNO-BIZ MAIN-BIZ Certificate of Designation for an Excellent Company High-growth Enterprise (Gazelles company) 5

6 Products Polymer Recloser for Outdoor A Solid Insulated Recloser (SIREC) with a bi-stable magnetic actuator has many advantages such as easy installation, high reliablity, compactness, light weight and environmentally friendly products. A controller with built-in RTU functions can perform self-healing and feeder automation even without communication. Live-line Hook Stick Close The recloser can close even into live line by using a manual operation handle (optional) HCEP(Hydrophobic Cycloaliphatic Epoxy Resin) More Durability with Water-Resistance Maintenance-Free Non SF6 PMA Bi-stable Mechanism (Permanent Magnetic Actuator) More than 10,000 mechanical operations. Dead line operation(battery close) Ready for SCADA Built-in RTU functions 3 CTs, 6 voltage sensors (resistive, capacitive) VIT self-healing algorithm Applied Standard IEC Electrical Characteristics Description SIREC SIREC-38 Rated Maximum Voltage 27 kv 38 kv Rated Continuous Current 630 A 800 A Making Current 16 ka 16 ka Short-Time Withstand Current 16 ka/1 sec 16kA /1 sec Min. Interrupting Time 3 cycles 3 cycles Min. Reclosing Sequence 0.5 sec-2 sec-5 sec 0.5 sec-2 sec-5 sec Impulse Withstand Voltage 125 kv/150 kv 170 kv Power Frequency Withstand Voltage Time 60 kv 70kV 6 Shinsung Industrial Electric Co., Ltd

7 Shinsung Industrial Electric Co., Ltd. SF6 Recloser for Outdoor The SMRC is a 3 phase, SF6 gas insulation, vacuum interruption auto circuit recloser designed for pole mounted or substation applications. The SMRC series recloser has been fully certified in accordance with ANSI C37.60 to meet and exceed customer specifications. All Integrated Design for SCADA system CTs, voltage sensors With built-in PT, customers can reduce the costs for separate PT installation, connection cable, protection fuse cutout, installation mounting frame, etc.(optional) Robustness and Long Service Life SF6 gas as an insulating medium and vacuum interrupter as an interrupting medium eliminate the necessity for periodic maintenance. Stainless steel tank case is TIG welded and double sealed by EPDM rubber, and it is sealed for life. The leakage rate of the SF6 gas from the tank is less than cc/sec, 0.2% per year. Protection PCB inside the Auxiliary Box provides an automatic CT shorting device and also protection for the control circuit from surge voltage. More than 10,000 times of mechanical operations. Operation Mechanism Low Voltage Closing Solenoid and Dual Latch Mechanism enable an opening time of less than 25 ms, clearing time less than 2.7 cycles, mechanical trip free, anti-pumping characteristics, emergency close/open and dead line operability. Manual Open-lockout Lever provides emergency trip and lockout for safety. Before reset, it prohibits electrical mechanical close. Manual closing shaft provides manual closing when the line is de-energized. Reliable Insulation and Interruption SF6 gas is a nonflammable, odorless, color-less, nontoxic and very stable insulation medium. SF6 gas meets the requirements of IEC With the vacuum interrupter and SF6 gas insulation, all the interruption and insulation ratings are guaranteed at atmospheric gas pressure. SMRC-15-S0 recloser tested at 20kA and SMRC-26-S0 tested at 12.5kA. Safety Devices The SMRC recloser was designed based on the concept of insulation coordination: external flash-over < internal flash-over at atmospheric gas pressure < puncture In the event of an internal insulation failure, the Safety Bursting Membrane, which is located opposite of the manual operating handle, ruptures (at 4-6 kgf/cm 2 g) to release over-pressurised gas in a safe direction. This eliminates the risk of explosion. The Low Pressure Sensor operates below 0.1 kgf/cm 2 g and gives dry contact, and it raises an alarm and/or lockout of the electrical operation. Electrical Characteristics Description SMRC-15 SMRC -26 Rated Maximum Voltage 15.5 kv 27 kv Rated Continuous Current 630 A 630 A Power Frequency Withstand Voltage (dry-1min / wet -10sec) 50 kv / 45 kv 60 kv / 50 kv Lightning Impulse Withstand Voltage (BIL) 125 kv 150 kv Rated Fault Making Capacity (peak) 52 kap 32.5 kap Rated Short Circuit Interrupting Current 20 ka 12.5 ka Mechanical/Electrical Operations 10,000 times 10,000 times Weight without Mounting Frame 235 kg 265 kg 7

8 R6 Recloser Control Overview The R6 is a is normal recloser control with a built-in RTU function. Function Main Recloser Function Dual Timing: fast, delay Number of lockout operations: 1~ 5 Programmable min. pickup: phase, ground, SEF Programmable Reclosing interval Time Current Curve: 32 Cooper conventional curves, 5 US curves, 5 IEC curves, 4 user-defined curves, 4 KEPCO curves. Complex curve - Constant time adder - Vertical multiplier - Minimum response time High current trip, lockout Cold load pick up Sequence coordination SEF (Sensitive Earth Fault) Additional Control Function Negative sequence current protection Demand/ Min and Max/ Energy metering 6 selectable setting groups ideal for loop scheme application Sequential events record Fault events report Fault waveform report Load profiling Breaker wear monitor Operation counter Gas pressure monitor Battery monitor Hot line tag against unexpected local and remote operation 3 stage security for setting change Local and remote operation RS 232 / RS 485 port / Ethernet(RJ45) DNP version 3.00 Level 2 for SCADA/ MODBUS for laptop computer communication IEC / IEC Emergency operation button in the control can close/open the recloser without relay MET Tester Compatibility: Since the main control cable of the SMRC & R6 has the same pin number as the Cooper recloser, the Cooper conventional control cable and MET tester can be used for SMRC recloser and R6 control Dead Line Operation with battery power 8 Shinsung Industrial Electric Co., Ltd

9 Shinsung Industrial Electric Co., Ltd. VIT R6 Recloser Control Overview The VIT Recloser control was designed and developed especially for automatic loop systems and to improve SEF, HIF and open conductor faults. It has many advanced features compared with conventional current controlled reclosers and can make a self-healing system with or without VIT LBS. There are loop systems using 3 or 5 reclosers, but the problems are limited sectionalizing points, no automatic setting group change, difficult series coordination and unnecessary short circuit impact on a healthy network during tie recloser close. When the VIT Recloser is used with VIT LBS, it can isolate. The source and load side of faulted section before tie switch close, and can restore the service by itself without any communication-assisted computer system. Main Features of VIT Recloser control Conventional recloser functions Directional phase, ground protection Fast, delay curve combination Sequence coordination Cold load pick up Directional SEF protection Directional negative sequence current protection Sympathetic trip restraint feature Additional functions Isolation source and load side of faulted section Normal open recloser lockout feature when the fault is in the zone of the tie recloser (No forced fault making) Automatic setting group change from normal to half from normal to double with load encroachment logic Sympathetic trip restraint feature after source side faults Event reports Measurements Load profile CB wear monitoring function DNP 3.0 Level 2 protocol IEC protocol Adaptive protection and measurements according to the power direction VIT recloser control uses the directional element and the polarity is automatically changed according to the power direction Hybrid Feeder Automation System using VIT Recloser Automatic setting group change During loop operation the recloser of the unfaulted feeder (source side recloser) should supply more current and the recloser of the faulted feeder (load side recloser) may supply reduced current. If the correct setting group cannot change automatically, then the computer system has to change the source side and load side recloser settings before sending a close command to the normal open switch. The VIT recloser control uses load encroachment logics for the source side recloser and changes the setting group of the load side recloser according to the power direction. The load encroachment logics qualify not only current amplitude, but also the power factor, so even if the load current exceeds the pickup level, it can still supply the power, but if there is an actual fault, it trips and protects the distribution line. 9

10 VIT R6 Recloser Control Self-Restoration System using VIT Recloser and VIT LBS The self-restoration system can achieve the same or better result than a communication-assisted hybrid feeder automation system in the aspects of speed, reliability, expandability, cost, etc. The large section is protected by a substation circuit breaker and distribution line recloser and if the fault is permanent after 1 or 2 trips of the CB or recloser, the VIT LBS opens simultaneously and closes one by one to identify and to isolate the fault. It can isolate the fault and can restore the service by itself without communication. The additional functions of the VIT recloser are designed to achieve the best performance of the self-restoration system matched with VIT LBS, but even without the VIT LBS it solves the problem of a conventional loop system because it can isolate the source and load side of a fault before tie recloser close and it can change the setting group by itself. Operation Mode Normal Recloser Mode In normal recloser mode, the operation is exactly the same as with a conventional recloser. If the load side of the recloser just has sectionalizers, the recloser should operate according to normal recloser mode. Functions Directional phase, ground overcurrent protection Directional SEF protection Directional negative sequence current protection Sympathetic trip restraint feature Event reports Measurements Load profile CB wear monitoring function DNP 3.0 Radial Line Mode Basic functions are the same as the normal recloser mode If the recloser is coordinated with 2 or 3 sectionalizers, then the radial line mode is not necessary If the downstream of the recloser use more than 2 or 3 sectionalizers, the VIT LBS is recommended The radial line mode will be best matched with the VIT LBS self-restoration scheme Loop Line Mode Basic functions are the same as the normal recloser mode Source side fault lockout feature Loss of voltage lockout feature Normal open (Tie) recloser lockout feature when the fault is at the zone of the tie recloser Tie recloser close function during loss of voltage on one side Automatic setting group change from normal setting group to load side setting group and vice versa according to power direction The normal setting group can supply more current without tripping, and without scarifying the sensitivity and security during loop operation. The load encroachment logics qualify both current amplitude and also power factor together. 10 Shinsung Industrial Electric Co., Ltd

11 Shinsung Industrial Electric Co., Ltd. Polymer Load Break Switch for Outdoor Solid Insulated Load Break Switch/Sectionalizer SILO is a hydrophobic epoxy resin insulated vacuum switch. The SILO load break switch can be manually and electrically operated to suit your power line requirements. Design for SCADA system 3 CTs, 6 Voltage Sensors are all integrated in the switch. These make the SILO Switch easily applicable to DAS or SCADA systems without any extra costs. Robustness and Long Life SILO use HCEP(Hydrophobic Cycloalipatic Epoxy Resin). A compact operation mechanism assembly is located inside the sealed case. Therefore, the mechanism assembly is protected from corrosion and every environmental attack. The Vacuum Interrupter ensures long contact life. The mechanical operation was tested 5,000 times and 10,000 times of operation are guaranteed. Quick Close/Open, Operator-independent Mechanism The simple toggle action spring mechanism performs operator-independent quick close, quick open operation (below 0.7 sec operation time). The driving motor is coupled with a manual operating handle through a one-way rotating bearing, so during manual operation, the motor will be decoupled automatically. Electrical Characteristics Description Rated Maximum Voltage Rated Continuous Current Rated Impulse Withstand Voltage (BIL) Rated Short-Time Withstand Current (rms) Power Frequency Withstand Voltage Mechanical Operations Weight without Mounting Frame SILO 25.8 kv 630 A 150 kv 12.5 ka (1sec) 60 kv (1min) 10,000 times 110 kg 11

12 SF6 Load Break Switch for outdoor SPGAS Series Load Break Switch/ Sectionalizer The SPGAS series is 3 phase, SF6 gas-insulated load break switch (LBS) for overhead lines operating at voltages up to 38 kv. It meets the demand for oil-less and maintenance-free operation. The SPGAS load break switch can be manually and electrically operated. The SPGAS series load break switch has been fully certified in accordance with IEC (1996), and IEC (1998) to meet and exceed customer specifications. All-in-one Design for SCADA system CTs, Voltage Sensors, and Built-In Potential Transformer can be integrated in the switch. These make the SPGAS Switch easily applicable to DAS or SCADA systems without any extra costs. Robustness and Long Life SF6 gas as an insulating and interrupting medium eliminates the necessity for periodic oil maintenance. A compact operation mechanism assembly is located inside the sealed tank case. Therefore, the mechanism assembly is protected from corrosion and every environmental attack. Stainless steel Tank Case with more than 3 mm thickness is designed for maximum robustness and minimum welding line to minimize corrosion. The robust tulip type contact made of copper-tungsten tips ensures long contact life. TIG welding process on stainless steel tank and double sealing technique with EPDM rubber shows 0.2% gas leakage rate per year and sealed for life time. SPGAS Switch has simple and robust mechanical construction; the mechanical operation was tested 5,000 times and 10,000 times of operation are guaranteed. Quick Close/Open, Operator-independent Mechanism The simple toggle action spring mechanism shows operator-independent quick close, quick open operation (below 0.7 sec operation time when in electrical operation). The driving motor is coupled with a manual operating handle through a one-way rotating bearing. Reliable Insulation and Interruption Capacity The enhanced arcing chamber design, with a pure puffer principle, makes the arcing time just half a cycle, so the decomposition of SF6 gas is negligible and the insulation characteristics of SF6 gas will not be decreased during service life. All insulation and interrupting ratings of the switch are guaranteed at atmospheric gas pressure (0.0 kgf/cm 2 g). The heavy-duty tulip type contacts made of copper-tungsten arc resistance material ensures making current test 5 times and load current swiching tested 400 times. There is no plastic bridge between open contacts, so it can be classified as a switch disconnector. Safety Devices In the event of an internal arc fault, the Safety Bursting Membrane on the rear side of the SPGAS Switch ruptures to release over-pressure gas. This eliminates the risk of explosion. Manual Lockout provides mechanical and electrical lockout when it is pulled down to the lock position using a hook stick. The Low Pressure Interlock or Low Pressure Sensor locks the operating mechanism or gives a signal to the controller if the gas pressure in the tank drops below a pre-set value. The SPGAS switch has passed an Internal Arcing Test with 20 ka for 0.1 sec in accordance with IEC and Insulation Coordination Test in accordance with IEC Shinsung Industrial Electric Co., Ltd

13 Shinsung Industrial Electric Co., Ltd. Electrical Characteristics Description SPG-15-6 SPGAS-26 SPGAS-36 Rated Maximum Voltage 15 kv 25.8 kv 38 kv Rated Continuous Current 630 A 630 A 630 A Rated Impulse Withstand Voltage (BIL) 110 kv 150 kv 195 kv Rated Short-Time Withstand Current (rms) 20 ka (4sec) 25 ka (1sec) 25 ka (1sec) Electrical Operations 400 times 400 times 400 times Mechanical Operations 10,000 times 10,000 times 10,000 times Weight without Mounting Frame 180 kg 200 kg 250 kg 13

14 VIT L6 LBS Control Overview The VITL6 VIT LBS CONTROL uses the voltage, current, and time elements to achieve feeder automation without communication. It reserves the advantage but overcome the disadvantage of conventional current-controlled schemes, and voltage-time controlled schemes. The results are Fast fault isolation, restoration of service without communication. Reduced number of switch operations. Unlimited number of switches can be coordinated. There is no series coordination problem even in a loop network. It can be used in radial, loop and radial, and loop mixed networks. Using a fault point locator, it can identify the fault section without communication. Operation The VITL6 have 4 operating modes to achieve the best coordination. Radial sectionalizer mode The radial sectionalizer mode is the best choice at the end of the radial line. The operation of the radial sectionalizer mode is exactly the same with current, and the count controlled sectionalizer. A maximum of 3 sectionalizers can be used according to the number of backup protective device operations to lockout. If the backup device is a circuit breaker, one or two counts sectionalizer can be used, and if the backup device is a recloser, a one, two, or three count sectionalizer can be coordinated. But if it is necessary to sectionalize more points, the remaining switches, other than 1 or 2 sectionalizers, should be set to radial normal close mode. Radial sectionalizer mode has the same features as the current, and the count controlled sectionalizer. Directional phase, ground min. pickup. Counts one, two, three. Counts reset timed from load current condition. Inrush restraint feature. This feature is activated when the control experiences normal current before current cessation to avoid miscounting because of the inrush current during the reclosing process of the backup device. If this feature is activated, the min. pickups raised to the preset multiply during preset restraint time. Sympathetic count restraint feature. This feature is activated when the fault is at source side based on undervoltage, no-fault current logics. This feature desensitizes the pickup level during preprogrammed time intervals. Count restraint feature using voltage element. One count to open feature during manual closing. Radial normal close mode This operating mode is selected to expand the number of switches in the radial line. The important features are Fault current counting: phase ground. Counting reset from load current condition. Close timer. Load side lockout timer. Counts block timer. Unlike a conventional V-T controlled scheme, only the switch that experienced the fault will be open after counts, so the restoration is very fast and can give a chance for the backup device to clear the temporary fault. Also, the number of switch operations is reduced by more than 50% of the V-T scheme through fault current tripping and count block function. 14 Shinsung Industrial Electric Co., Ltd

15 Shinsung Industrial Electric Co., Ltd. Loop normal close mode If this operating mode is selected, it has more functions than the radial normal close mode. Loss of voltage lockout feature. Counting reset from load current coordination. - Load side lockout timer. - Counts block timer. Loss of voltage, fault current counting. Close timer. Source side lockout timer. If there is a fault in the loop network, the source and load side is already isolated before the normal open switch close, so it can avoid unnecessary outages during normal close switch close. Loop normal open mode This operating mode has the same function as the loop normal close mode, but has more functions. Normal open source side lockout feature. Normal open close timer. Two setting groups according to the power direction. S1 -> S2, S2 -> S1 Automatic mode change from normal open mode to normal close mode when it is closed. Automatic mode change from normal close mode to normal open mode and lockout when it is opened manually. This lockout state will be reset automatically when there is voltage on both sides. 15

16 L3 Control L3 Control has a motor control circuit, current, and voltage outputs to third-party RTU and modem space. Features Power Supply and Battery Rectified DC 24V power from 220 Vac or 120 Vac and the battery supplies the control power. 24 Vdc power is connected in parallel with the battery and the other part of the control circuit. Battery charger has 2 modes: one is a rapid charging mode with higher current and the other is a trickle charging mode with lower current. Battery: lead acid battery 18 Ah and 24 Vdc input toward the control circuit. Local Control Circuit The electric surge protection and impedance-matching circuit board is constructed and tested to meet the latest applicable standards of IEC and ANSI/IEEE C current and 6 voltage signals are interfaced with the RTU through an impedance matching board. Test battery and charger test button. Local/remote control selection switch. Local close/open button. Separate Open (green) and Close (red) status LED LAMP. Low gas pressure status LED LAMP. RTU (Option) A third-party RTU can be connected easily and of course Shinsung RTU can be supplied. Power Supply and Battery 220 Vac or 110 Vac can be connected. Lead acid battery or lithium polymer battery can be installed. Battery and charger test circuit. 16 Shinsung Industrial Electric Co., Ltd

17 Shinsung Industrial Electric Co., Ltd. S5 Sectionalizer Control S5 Sectionalizer Control is microprocessor control without RTU functions. It has the functions of phase, ground, SEF detection, 4 shot counting, Inrush Current Restraint, One Shot to Lockout, Gas Pressure and Battery Monitoring, Fault Event Record, and Sequential Event Report. Loop normal close mode LCD Display: 4 Lines 20 Characters LCD Operation Buttons: 6 Operation Buttons Status LEDs : CONTROL ENABLED, HANDLE LOCK, GAS LOW, AC POWER, BATTERY OK Fault Indication LEDs : A-PHASE, B-PHASE, C-PHASE, GROUND, SEF Test Buttons: Battery Test Button, Reset/Lamp Test Button Operation Buttons and Status LEDs : Close Button and Status, Open Button and Status Others: Wake-up Button, RS-232 Communication Port, NFB, Protection Fuse Measurements and Status Current: Ia, Ib, Ic, Ig Input currents (A primary) Status: Shot Count, Close/Open Status, Operation Counts Digital Input Status: Switch Close/Open, Gas Normal/ Abnormal, Handle Lock/Unlock, AC Power On/Off, Battery Good/Fail Digital Output (0/1) Status: Close, Open, Battery Test Event Reports Fault Event: Ia, Ib, Ic, Ig, Time and Date, Latest 20 events Sequential Event: Relay On, Setting Change, Local Open, Local Close, Switch Open, Open Fail, Switch Close, Close Fail, Gas Low, Gas Normal, Handle Lock, Handle Unlock, AC Power On, AC Power Off, Battery Fail, Cable Connected, Cable Disconnected, Abnormal: Set Value, Abnormal: Checksum, Abnormal: [Voltage Value], Normal: [Voltage Value], Latest 200 events Setting Ranges The Settings of S5 can be made through LCD Buttons in the control or through a personal computer. Minimum Pickup Phase: A/1 A steps Minimum Pickup Ground: OFF, A/0.1 A Minimum Pickup SEF: OFF, A /0.1 A Shot Count: 1-4/1 Count Reset Time: 1-60,000 cycle / 1 cycle Inrush Restraint - Multiple Phase: 1-10, Block / 1 - Time Phase: 1-60 cycle / 1 cycle - Multiple Ground: Block - Time Ground: cycle / 1 cycle One Shot To Lockout: Enable, Disable One Shot To Lockout Reset Time: 1-60,000 cycle / 1 cycle Time Settings: Year/Month/Date, Hour: Min: Sec General Specifications Power Source Inputs: AC 220V standard, and other values (110, 240 Vac) also available Frequency: 50/60Hz Battery: - Output Voltage: DC 24 V - Capacity: 7Ah at +25 C - Block Overcharge: 29 V - Block Over-discharge: 22 V - Battery and Charger Check Circuit: Yes - Run Time: over 24 hrs (or more time as option) without AC power - Switch Control: over 100 times (or more times as option) without AC power - Recharging Time: within 48 hrs after full discharge - Life Time: 3 years (varies according to ambient temperature) S5 Relay Power Supply: DC 24 V Power and Control Cable Interface - Power Cable and Receptacles: 3 pins - Control Cable and Receptacles: 37 pins Environmental Condition - Ambient Operation Temperature: -25 C ~ 70 C * LCD contrast impairs for temperature below 0 C (- 20 C as option) Control Cubicle - Dimensions: H500 W350 D225 (mm) - Weight: 23 kg - Material: Stainless Steel Test Standards - Dielectric Strength: IEC Impulse: IEC MHz Burst: IEC Electrostatic Discharge: IEC Radiated Radio Frequency: IEC , IEEE C Fast Transient: IEC Surge Withstand: IEEE C (1989) - Vibration: IEC Shock & Bump: IEC KSC 0220: Low Temperature Test - KSC 0221: High Temperature Test 17

18 Fused Vacuum Switch for Customer & Main Line Protection Shinsung s SILF was designed and developed especially to protect the main feeder from customer fault and to provide reliable 3 phase protection of customer facilities. Installation Installed at the interconnection point between the main feeder and customer up to 1600 kva Robustness and Long Life The current limiting fuse can clear a fault faster than any other protection devices (0.5 cycle), so it can protect the main feeder even before the fast operation of the recloser in many cases. 3 phase protection with fused vacuum switch (fused striker trips the vacuum switch) Non SF6, hydrophobic epoxy resin insulation No electronics, no maintenance Reliable mechanical operation Applied Standards Fuse Combination Test: IEC Load Break Switch: IEC , GS Current Limiting Fuse: IEC Electrical Characteristics Description Rated Maximum Voltage Rated Continuous Current Short-Time Withstand SILF 25.8 kv 400 A(*) 12.5 ka/1 sec Rated Making Current 32.5 kap (*) Rated Impulse Withstand Voltage (BIL) Power Frequency Withstand Voltage Fuse Length Dimensions (W D H) Weight Capacity 150 kv 60 kv 292 mm ( ) mm 120 kg Up to 1600 kva * Vacuum switch itself 18 Shinsung Industrial Electric Co., Ltd

19 Shinsung Industrial Electric Co., Ltd. SF6 RMV6 for Medium Voltage cable network The RMV6 is a compact extensible unit combining different kinds of MV functional units to make a ring or radial network, to protect the transformers. Fuse switch combination up to 1600 kva Fuse switch combination with watchdog function up to 1600 kva CB (200 A) with relay CB (630 A) with relay * Watchdog functions are by request Line protection with 630 A circuit breaker Network switching by load break switch SCADA mate: remote operation, voltage, current sensor, sensitive zero phase CTs Automatic load transfer scheme - Using 2 switch LBS and one fuse switch combination with control - Using 2 CBs and one dummy part with control * Very fast transfer time - outage time can be below 1 cycle Compact and extensible - Compact: all in one units in a single stainless steel enclosure - Extensible: extensible to left and or right side without handling gases, no special tools Operating safety Cable insulation test To inject the 42kV DC for 15 minutes for cable insulation test without disconnecting the connecting devices, it has a cable test point. The earthing busbar will be removed after the earthing switch closes and using the optional injection cable, the voltage can be injected. Interlock the switchgear The main and earthing switch are interlocked manually and or electrically. The earthing switch can be closed when the main switch is open, and the main switch can be closed when the earthing switch is open. Interlock the fused switch If one of the fuses are blown, the switch cannot be closed before resetting the fused part. Protection from internal arc; safety membrane The RMV6 has one or 2 safety membranes to protect people from internal arc. The hot gas will be released to the rear or to the bottom without affecting conditions in the front. 19

20 SF6 RMV6 Description RMV6 comprises 1 to 6 integrated functional units. The sealed for life, stainless steel enclosure group together the live parts, switch disconnector, earthing switch, fuse switch and circuit breaker. The fuse canister, which is metallic shielded, is are located on the upper side, so the cable connection can be done easily on the front side. Tightness The stainless steel enclosure is filled with SF6 at 0.2 bar gauge pressure and it is sealed for a 30-year lifetime. Load break switch The arc extinction uses the proven SF6 puffer technique. Fuse switch The switches of the fused switch units can interrupt the transfer current of 1750 A at 12 kv, 900 A at 24 kv. The fused switch units have upstream and downstream earthing switches. The fuse canister is locate at the top of enclosure and is fully metallic shielded and is accessible from front side. Circuit breaker 200A and 630A are available for transformer protection and network protection. The short circuit currents are cleared by a vacuum interrupter, so it has a long lifetime and the gas will not be exposed to the arcs short circuits. Extensible on site The integrated RMV6 or functional units can be extended on site from the left or right side - Without handling gases - No special tools - No particular preparation of the floor Mechanism - Switch disconnector Main switch: Spring toggle mechanism with motor The operation time takes 0.7 sec after commands Earthing switch: Spring toggle mechanism - Fuse switch, circuit breaker, automatic load transfer units Main switch: Spring stored energy mechanism with motor O sec, CO - 15 sec Earthing switch: Spring toggle mechanism - Bus tie coupling switch CB or LBS are available as bus tie couplers with spring stored energy mechanism (CB) or spring toggle mechanism (LBS) Automatic load transfer scheme The RMV6 can have the functions of automatic load transfer. 2 LBS with tee-off fused switch - Ground fault protection - Overload, short circuit protection - Transfer from main to alternate source Close transition: Close the main source and open the alternate source Open transition: Open the alternate source and close the main source - Fault block Prevent transfer action when the fault is on the load side. 2 LBS with tee-off CB - Ground fault protection - Overload, short circuit protection - Transfer from main to alternate source Close transition: Close the main source and open the alternate source Open transition: Open the alternate source and close the main source - Fault block during tee-off circuit fault Prevent transfer action when the fault is on the load side. 2 CB with or without tee-off LBS - Same functions as 3 LBS scheme - Very fast transfer time (1 cycles) For water pumping stations and important loads, a very fast transfer time may be necessary. The actual 3 phase outage time can be within one cycle. 20 Shinsung Industrial Electric Co., Ltd

21 Shinsung Industrial Electric Co., Ltd. Electrical Characteristics SD Module FS Module CB Module Switch ES Switch Downstream ES CB ES Rated Voltage kv 17.5/ / / / / /24 Power frequency withstand kv 38/60 38/60 38/60 38/60 38/60 38/60 Impulse withstand kv 95/125 95/125 95/125 95/125 95/125 95/125 Rated current A / /630 Breaking capacity Active load A 630 Closed loop A 630 Off load cable charging A 200/150 Earth fault A 115/87 Earth fault cable charging A Short Circuit breaking A 20/12.5 Transfer Making capacity / Short-time current 1sec /12.5 Short-time current 3sec Short-time current 4sec Operation time Close sec 0.7 <0.045 <0.045 Open sec 0.7 <0.045 <0.045 Spring charge sec <8 <8 Functional units Network switch Fused switch 200A Circuit breaker 630A Circuit breaker I Q B D Bus Tie switch Bus Tie Circuit breaker Cable Connection Network switch for ATS IC BC O J 21

22 Polymer HSSB High Speed Source Transfer Circuit Breaker The HSSB is a specially designed source transfer circuit breaker for important loads like hospitals, commercial buildings, government offices, stadiums, water pumping stations, etc. Non-SF6, solid insulation, vacuum circuit breaker with 3 position disconnecting switch Non-SF6, epoxy insulation Metallic shield No external busbar connection (one mold, 3 way switches) 3 position disconnecting switch: ON,OFF, Earth Solves the unstable insulation problem of vacuum interrupters Safety interlock between circuit breaker and disconnecting switch 2 CB with 2 disconnectors and 1 Tee-off disconnector Ultra high fast source transfer From voltage sag to completion of source transfer takes less than 5 cycles 3 phase outage time can be within 1 cycle (in many cases, the computers are still running) Tee-off circuit protection The CB protects the Tee-off circuit from phase, ground faults. If the fault is on the load side, the fault will be isolated, and the transfer will be blocked. Transfer If voltage is decreased on one side (voltage sag) or lost, then the CB of the main source will be open and simultaneously the CB of the alternative source will be closed. Three transfer mode Ultra fast transfer mode From voltage sag to the completion of transfer takes less than 6 cycles. 3 phase outage will be limited within 1 cycle. Fast transfer Mode If voltage is lost on one side, then the HSSB will transfer to a healthy feeder as soon as possible, but to avoid damage to the motor load, it checks the voltage of the load side and if it is below 30% of normal, then it permits transfer. Normal transfer mode It starts the transfer timing after confirming permanent outage. To distinguish between a temporary fault and a permanent fault, it makes voltage countings and if the countings are the same as the number of trips to lockout of the backup device, it will transfer. 22 Shinsung Industrial Electric Co., Ltd

23 Shinsung Industrial Electric Co., Ltd. Retransfer mode During retransfer, there are two retransfer modes. Close transition If two sources are synchronized, then it will retransfer without outage by closing the main source first and then opening the alternative source. Close transition is only permitted if two sources are synchronized. If it is not synchronized, it operates as an open transition mode. Open transition If two sources are not synchronized, then during retransfer, the control will open the alternative source CB first and then will close the CB of the main source. All in one μ-processor control 2 circuit breaker relays and source transfer functions are performed by one controller. So compared with separate relays and source transfer schemes, the wiring is very simple and the interlock and reliability are much better. RTU function It has a DNP 3.0 protocol and TCP/IP connection port. All in one, μ-processor control 2 CB control T.C.C., 48 types + 4 users curve Complex curve Time dial Adder Min. response time Direction Phase ; V1, I1 Ground; V0, I0 Functional units Description Rated Maximum Voltage Rated Continuous Current Speed of source transfer from voltage sag Making Current SICB 25.8 kv 600 A Within 5 cycle 12.5 ka Power Frequency Withstand Voltage 60 kv Impulse Withstand Voltage 125 kv Dimensions of the Enclosure 1,200(W) 800(D) 1,100(H) Main Circuit Diagram Earth OFF ON OFF Earth 3 - position disconnector ON OFF DSx DSz DSy Earth ON Vx CBx Circuit Breaker CTx Current Sensor Vz Voltage Sensor Vy CBy CTy Main Tee- Off Alternative 2 CB, 2D/S as source switch (Main/Alternative) 1 D/S as Tee-Off 3 Position D/S (On, Off, Earth) 9 Voltage Sensors (Main/Alternative source, Tee-Off ) 6 CTs (Main/Alternative Source) 23

24 SF6 Ring Main Circuit Breaker SMCB Ring Main Circuit Breaker is pad mounted fully deadfront switchgear for up to 25.8kV, 630A underground system, combining puffer load break switches and vacuum fault interrupters. This SMCB series switchgear has earthing switches to provide added safety. Every bushing has CT and voltage sensors. And combined with SCADA-ready control, this circuit breaker can be remotely operated from a system control center. SMCB series Ring Main Circuit Breakera have been fully certified in accordance with IEC , ANSI C37.60 (1981) and ANSI/IEEE C37.71 (1984) to meet and exceed customer specifications. All-in-one Design for SCADA system CTs, voltage sensors fitted on bushings, Auxiliary PT (Power Transformer), and RTU are all integrated in the SMCB. These enable the SMCB to be easily applicable to DAS or SCADA systems without any extra costs. The Integrated Auxiliary PT (with fuse) achieves a self-power supply system for the control circuit. Robustness and Long Service Life Using SF6 gas as an insulating medium eliminates the necessity for periodic oil maintenance. The stainless steel Tank is TIG welded and the other sealing points (bushings, operating shafts, gas filling valve) are sealed with EPDM rubber, so the Tank keeps good gas and water sealing characteristics for its service life. The leakage rate of the SF6 gas from the Tank is less than cc/sec, 0.012% per year, sealed for a lifetime. Moisture absorber (Zeolite). The energy stored spring charge mechanism (for CB) and quick close, quick open spring toggle mechanism (for the Switch) are located inside the mechanism case on the switching tank. Therefore, the mechanism parts are protected from every physical and environmental attack. The Control Unit provides an automatic CT shorting device and surge protection. The Stainless steel Tank with 3-5 mm thickness is designed for maximum robustness and minimum welding line. The Tank is designed for maximum robustness. Therefore, even at the bursting pressure of the safety membrane (1.5 kgf/cm 2 g), the switching operation is not disturbed, and the Tank and bushings are not damaged up to that pressure. The time- and industry-proven vacuum interrupter ensures a safe and long lifetime. Both the switch part and CB part, with mechanical operations tested 5,000 times and 10,000 times, respectively, are guaranteed. Operating Mechanism The operation mechanism of the SMCB is composed of an energy stored spring charge mechanism for the CB, spring toggle action mechanism for the load-break switch and 3 phase group-operating principle for both. Manual close/open of the CB part is carried out by two operation parts, the spring charging part and close/open button on the mechanism case. Electrical operation is performed by the spring charging motor and close/open button on the control panel. Manual close/open of the Switch is carried out by an operating shaft. Electrical operation is performed by the driving motor and close/open button on the control panel. Earthing Circuit close/open of the CB and Switch is manually carried out by an operating shaft. The energy stored spring charge mechanism has an opening time of about 25 ms, a clearing time of 2.7 cycles, is mechanical trip free and has anti-pumping characteristics. The spring toggle mechanism shows operator-independent quick close, quick open (700 ms) closing/opening operation. Since any manual operating mechanism of the CB and Switch is independent of each electrical operating mechanism, manual operation is always guaranteed, even when the driving motor or any part of the electrical operation module is out of order. 24 Shinsung Industrial Electric Co., Ltd

25 Shinsung Industrial Electric Co., Ltd. Reliable Insulation and Interruption SF6 gas is a nonflammable, odorless, colorless, nontoxic and very stable insulation medium by nature. The SF6 gas quality used in SMCB meets the requirement of IEC In the case of CB parts, SF6 gas provides electrical insulation only, but load and fault interruption take place inside the sealed vacuum interrupter. In the case of the Load Break Switch part, insulation and interruption media are SF6 gas. An arcing chamber using the pure puffer principle makes the arcing time just half a cycle. Thus the quantity of decomposed SF6 gas from the arc is negligible and the insulation of SF6 gas doesn t decrease during its service life. All the electrical characteristics are guaranteed at atmospheric gas pressure. The industry proven vacuum interrupter of the CB part experienced fault making and interrupting duty cycles 58 times at 20 ka with 15 kv class SMCB and 12.5 ka with 25.8 kv class SMCB. The heavy duty tulip type contacts of the Switch part are made of copper-tungsten arc resistance material. The contacts experienced 5 making current operations and 100 load current switching operations. However, since the contacts are common with a pole top Switch, we can guarantee for 400 times load current switching operations, citing the test reports of SPGAS pole top Switch. The Epoxy Bushing has a voltage screen to give an analog signal input to the RTU. Safety Devices In the event of an internal insulation failure, the Safety Bursting Membrane at the bottom side of the Tank ruptures (at 1.5 kgf/cm 2 g) and releases over-pressure gas in a safe direction. This eliminates the risk of tank explosion. Since the SMCB uses SF6 gas instead of oil, a major fire hazard from internal insulation failure is eliminated and the SMCB can be located close to more sensitive outdoor locations. Mechanical Interlock between Main Switch and Earthing Switch The Low Pressure Sensor detects minimum gas pressure (0.1 kgf/cm 2 g) and gives dry contact to the control unit. The Gas Pressure Gauge monitors the gas pressure on the front side. A padlock for the lid of the Manual Operating Shaft Hole is provided in order to secure safety for maintenance persons. Microprocessor-Based Control Microprocessor controlled relays have the functions of protection, measurement, event record, fault record and RTU functions. Electrical Characteristics Description SMCB-16 SMCB-26 Maximum System Voltage 15 Kv 25.8 kv Rated Continuous Current 630 A 630 A Electrical Operating Time of CB (Close/Open) Electrical Operating Time of LBS (Close/Open) 60/25 ms 700 ms 0/25 ms 700 ms Minimum Clearing Time of CB 2.7 cycles 2.7 cycles Short Time Withstand Current ( rms) 20 ka (4 sec) 12.5 ka (1sec) Breaking Capacity of CB 20 ka 12.5 ka Insulation Level Lightning Impulse Withstand Voltage 95 kv BIL 125 kv BIL Weight without Outer Enclosure 670 kg (2CB 2SW) 25

26 C3 Control for Ring Main Circuit Breaker C3 Control is connected with the SMCB series Ring Main Circuit Breaker. It can communicate with SCADA or DAS via RTU and modem. Features A dual overcurrent relay without a reclosing relay can control two (2) CB and two (2) LBS. It performs phase, ground, and overcurrent protection with 32 Cooper conventional curves, 5 US curves, 5 IEC curves, 4 user defined curves. A lead acid battery provides DC power to the local control circuit board in case of an AC power source loss. The battery has sufficient capacity to sustain more than 24 hours of operation without AC power, and has a minimum lifetime of 3 years. The battery is automatically disconnected from the control circuit when the battery voltage falls below a preset value in order to prevent deep battery discharging. Power Supply Rectified DC 24 V power from 220 Vac or 120 Vac and the battery supplies the control power. The battery charger has 2 modes: one is a rapid charging mode with higher current and the other is a trickle charging mode with lower current. Battery: lead acid battery 35 Ah and 24 VDC input toward control circuit. Local Control Circuit 3 current and 3 voltage signals per each one way are interfaced with the RTU through an impedance matching board. Check button for the battery voltage on load condition and battery charger Local/remote control selection switch Local close/open button Separate Open (green) and Close (red) status LED lamp RTU (option) The RTU is developed to communicate with a center control, to measure the electrical quantity, and to get fault information. It uses the DSP for calculation and microprocessor for other tasks. It can measure the V, I, VA, W, VAR and power factor, detect the fault current, and memorize the waveform for further analyzation. Please refer to the chapter, RTU in this document. 26 Shinsung Industrial Electric Co., Ltd

27 Shinsung Industrial Electric Co., Ltd. Polymer Pad Mounted Load Break Switch The polymer pad mounted LBS (SILB) is solid insulated switchgear for automatic cable networks. Features Fully metal shielded solid insulation with vacuum switch Vacuum switch with three positon disconnector switch and good safety SCADA mate (CT and voltage sensor motorized) Non-extendable No external bus bar connection Electrical Characteristics Description Maximum System Voltage Rated Continuous Current Rated Short-Time Current SILB 25.8 kv 600 A 12.5 ka/1 sec Rated Fault Making Current (peak) 32.5 kap (*) Number of Mechanical Operations 150 kv Insulation Level Lightning Impulse Withstand Voltage Power Frequency Withstand Voltage Phase to Ground (after duty test) Pole to Pole (after duty test) 60 kv / 1 min 125 kv BIL 165 kv BIL DC Voltage Withstand Voltage 78 kv 27

28 SF6 Pad Mounted Load Break Switch SSPGS is SF6 pad mounted switch for automation of an underground system. It has mechanically interlocked earthing switches and integrates CTs and voltage sensors to give analog signal inputs to the RTU. The SSPGS Series pad mounted load break switch has been fully certified in accordance with IEC and ANSI/IEEE (1984) to meet and exceed customer specifications. All-in-one Design for SCADA system CTs, Voltage Sensors, and Power Transformer (option) are all fitted in the SSPGS. This all-in-one SSPGS RMU is easily applicable to DAS or SCADA systems without any extra costs. Microprocessor-Based Control Combined with CTs and voltage sensors, the RTU can measure electrical quantities and can detect fault information. SF6 gas as an insulating medium eliminates the necessity for periodic oil maintenance. The stainless steel Tank is TIG welded and the other sealing points (bushings, operating shafts, gas filling valve) are sealed with EPDM rubber, so the Tank keeps good gas and water sealing characteristics during its service life. Robustness and Long Service Life The leakage rate of the SF6 gas from the Tank is less than cc/sec, % per year,sealed for a lifetime. Gas molecular absorber. Quick close, quick open operator independent spring toggle mechanism. CT shorting device. Safety Membrane bursting at 1.5 kgf/cm 2 g. The SSPGS experienced a mechanical operation test 5,000 times, and 10,000 times of mechanical operation are guaranteed. Quick Close/Open, Operator-independent Mechanism The operation mechanism is an operator independent spring toggle action mechanism with a 3 phase group-operating principle. Manual and electircal operation. Electrical closing/opening times are both 70 ms. 28 Shinsung Industrial Electric Co., Ltd

29 Shinsung Industrial Electric Co., Ltd. Reliable Insulation and Interruption SF6 gas is nonflammable, odorless, colorless, nontoxic and very stable insulation medium by nature. The SF6 gas quality used in SSPGS meets the requirement of IEC Insulation and interruption are all carried out by SF6 gas. The arcing chamber, using the puffer principle, makes the arcing time just a half cycle. Thus, the quantity of decomposed SF6 gas from the arc is negligible and the insulation capacity of SF6 gas doesn t decrease during its service life. All the electrical characteristics are guaranteed at atmospheric gas pressure. The heavy duty tulip type contacts are made of copper-tungsten arc resistance material. The Switch can endure more than 5 making current operations and 400 load current switching operations. Safety Devices The Safety Bursting Membrane on the bottom side of the tank ruptures at 1.5 kgf/cm 2 g to excessive gas pressure. Since the SSPGS uses SF6 gas instead of oil, a major fire hazard from internal insulation failure is eliminated and it can be located close to more sensitive outdoor locations. Mechanical Interlock between Main Switch and Earthing Switch The Low Pressure Sensor detects minimum gas pressure (0.1 kgf/cm 2 g) and gives dry contact to control unit. The Gas Pressure Gauge monitors the gas pressure. There is a padlock arrangement for unexpected manual operation security. The nominal gas pressure is 0.7 kgf/cm 2 g. However, all the electrical ratings and characteristics are guaranteed at atmospheric gas pressure. Electrical Characteristics Description SSPGS-16 SSPGS-26 Maximum System Voltage 15 kv 25.8 kv Rated Continuous Current 600 A 600 A Rated Fault Making Current (peak) 52 kap 32.5 kap Electrical Operating Time (Close/Open) 700 ms each 700 ms each Number of Mechanical Operations (main) Number of Mechanical Operations(ground) 5,000 times 1,000 times 5,000 times 1,000 times Short Time Withstand Current ( rms) 20 ka (4 sec) 12.5 ka (1 sec) Lightning Impulse Withstand Voltage 95 kv BIL 125 kv BIL Insulation Level Power Frequency Withstand Voltage 50 kv 60 kv DC Voltage Withstand Voltage 53 kv 78 kv 29

30 P2 Control for Pad Mounted Load Break Switch This control has been designed to work with the SSPGS-AUTOMATIC Type pad mounted load break switch. It can communicate with SCADA or DAS via RTU and modem. Features The control cubicle mounted and fixed on the top of the pad mounted load break switch is fabricated from stainless steel of not less than 2 mm thickness. The electric surge protection and impedance-matching control circuit board is constructed and tested to meet the latest applicable standards of IEC and ANSI/IEEE C The lead acid battery provides DC power to the local control circuit board in case of a AC source power loss. The battery has sufficient capacity to sustain more than 24 hours of operation without AC power, and has a minimum lifetime of 3 years. The battery is automatically disconnected from the control circuit when the battery voltage falls below a preset value in order to prevent deep battery discharging. Power Supply Rectified DC 24V power from 220 Vac or 120 Vac and the battery supply the control power. The battery charger has 2 modes: one is a rapid charging mode with higher current and the other is a trickle charging mode with lower current. Battery: lead acid battery 35 Ah and 24 VDC input toward control circuit Local Control Circuit 3 currents and 3 voltage signals per one way are interfaced with the RTU through the impedance matching board. Check button for the battery voltage on load condition and battery charger Local/remote control selection switch Local close/open button Separate Open (green) and Close (red) status LED lamp RTU (option) The RTU was developed to communicate with center control, to measure electrical quantity, and to get the fault information. It uses the DSP for calculation and microprocessor for other tasks. It can measure the V, I, VA, W, VAR and power factor, detect the fault current, and memorize the waveform for further analyzation. Please refer to the chapter RTU in this document. 30 Shinsung Industrial Electric Co., Ltd

31 Shinsung Industrial Electric Co., Ltd. RTU P3 RTU for Pole Mounted LBS U3 RTU for Pad Mounted Switchgears The RTU for the pole top switch (P3) and the RTU for the pad mounted switch (U3) are widely used in the KEPCO distribution network. The RTU has special fault indicator logics to send the fault information to the host computer, and the host computer decides the faulted section according to fault, no fault logics. The section between the load side fault and the source side no fault should be a fault, and it is isolated by the open command from the computer. The close command of a normally open switch to restore the service is done either manually or automatically. The RTU also has loss of phase logics to protect the distribution lines from high impedance ground faults. If there is a high impedance ground fault and and 1 or 2 lose voltage, the load side RTU of the faulted section sends a loss of phase information to the host computer, and then the computer decides the faulted section according to similar logics of fault, no fault logics. The isolation and restoration process is the same as the fault current situation. Inputs, Outputs The P3 RTU for pole top switch has 3 current inputs and 6 voltage inputs and controls one switch. The U3 RTU for pad mounted switch has 12 current inputs and 12 voltage inputs and controls 4 switches simultaneously. Measurement Instantaneous Metering Currents I a, b, c, n input currents Voltages V a, b, c wye-connected voltage inputs Mw a, b, c megawatts (wye-connected voltage inputs only) Power Mvar a, b, c megavars (wye-connected voltage inputs only) Power factor PF a, b, c power factor; leading or lagging Demand Metering Currents I a, b, c, n input currents Power MW a, b, c MVAR a, b, c megawatts (wye-connected voltage inputs only) megavars (wye-connected voltage inputs only) Max./Min. Metering Currents I a, b, c, n input currents Power MW3p MVAR3p 3 phase megawatts 3 phase megavars 31

32 Events Many kinds of events with time tags are useful for the analysis of the switch, RTU, communication and power line. Power - on/off Ext. Power - on/ off Self-testing result Change the settings Switch - close/open (remote/local communication port) Lock/unlock Low gas Low battery Line voltage - on/off, source side/load side Fault - pick up/drop out Phase discord 1 or 2 losses of line voltage Fault Indicator Fault information is used for identifying the faulted section. It has special logics to distinguish between a temporary fault and a permanent fault. Inrush Restraint Feature: If the RTU experiences normal current before current cessation, the inrush restraint feature is activated and then the min pickup will be multiplied during preset time intervals to restrain mis-fault indication because of inrush current. Pre-detecting Time (software programmable): If the overcurrent condition lasts more than this time, it is validated as the start of a potential fault. In Progress: It memorizes the current, voltage, and waveform until the overcurrent condition finishes, and it takes the maximum rms fault current. Final: If the overcurrent condition is finished and the current goes to 0 (the backup protection device clears the fault) or goes to normal current (the forward protection device clears the fault), it finalizes the former process as one fault event, but the final decision of termporary or permanent fault is still withheld. It waits for the maximum reclosing interval of the backup device, and when the programmed time elapses it finally decides whether the overcurrent was a temporary or permanent fault. Every effective overcurrent condition is recorded as an event and the final temporary or permanent fault information is recorded as fault indicator information. It consists of start time, fault current level, end time, number of overload conditions and temporary or permanent fault information. The fault indicator can check the forward fault or reverse fault to give the correct fault information. Communication Ports Port 1: RS-232 for connection with modem via DNP 3.0 level 2. Port 2: RS-232 on the front panel for communication with personal computer. 32 Shinsung Industrial Electric Co., Ltd

33 Shinsung Industrial Electric Co., Ltd. SF6 Gas-Insulated Switchgear (GIS) 25.8 kv Gas-insulated Switchgear (GIS) Applied Standard IEC ( ) IEC ( ) IEC ( ) ES ( ) ES ( ) Characteristics 1. Type Tested (M2, C2, E2, S1) 2. The Circuit Breaker is specially designed for easy disconnection, easy installation, and easy maintenance. 3. Each bay is divided into functionally distinct gas compartments that allow live-line work. 4. The PT bay consists of each busbar that can control double busbars at the same time. Technical Data Rated Voltage 25.8 kv Making Time 5 cycle Rated Frequency 60 Hz Control Voltage 125 Vdc Rated Current 2000 A / 600 A Electrical Life Class E2 Rated Short - Time Current 25 ka (65 kap) C2 Power Frequency Withstand Voltage Lightning Impulse Withstand Voltage 70 kv(77 kv) / 1min. Mechanical Endurance Class M2 150 kv (165 kv) BIL Applied Standard S1 Dimension 600(W) 2,500(H) 2,100(D) Rated Gas Pressure (20 ) 0.5 bar 33