SECTION SWITCHBOARDS

Transcription

1 SECTION PART 1 - GENERAL 1.1 SUMMARY A. Work Included: 1. Switchboards 2. Commercial Metering Switchboards 3. Non-Utility Power Meters (Microprocessor-Based Metering Equipment) PART 2 - PRODUCTS 2.1 MANUFACTURERS A. Switchboards 1. Eaton 2. GE Industries 3. Siemens 4. Basis of Design: Schneider Electric/Square D 5. Or approved equivalent. B. Commercial Metering Switchboards 1. Eaton 2. GE Industries 3. Siemens 4. Basis of Design: Schneider Electric/Square D 5. Or approved equivalent. C. Non-Utility Power Meters (Microprocessor-Based Metering Equipment) 1. Eaton 2. GE Industries 3. Siemens 4. Basis of Design: Schneider Electric/Square D 5. Or approved equivalent. D. Manufacturers listed above are allowed on condition of meeting specified conditions including available space for equipment, Code required working clearances, and both amps interrupting capacity (AIC). Prior to submitting bid, manufacturer to provide documentation to Engineer verifying specific conditions, including those mentioned above, can be met. Remove and replace electrical equipment installed, at no cost to the Owner, that does not meet these conditions. 2.2 A. Description: NEMA PB 2 freestanding switchboard with electrical ratings and configurations as indicated and specified Page 1

2 B. Integrated Equipment Rating: Provide fully rated integrated equipment rating greater than the available fault current. Series rated switchboards are not acceptable. Reference drawings for available fault current. If drawings do not have available fault current shown, then coordinate with serving electrical utility. C. Bus Material: Copper, standard size. D. Ground Bus: Extend length of switchboard, 50 percent of phase bus capacity. E. Neutral Bus: 100 percent rated, full length of switchboard. F. Lugs: Mechanical type for copper conductors. G. Fusible Switch Assemblies: NEMA KS 1, quick make, quick break, load interrupter enclosed knife switch with externally operable handle. Provide interlock to prevent opening front cover with switch in ON position. Handle lockable in OFF position. Fuse clips: Provide fuse rejection feature for Class R fuses up to 600 amp. 1. Provide switches of 30 to 200 amp with plug-on line side connections. H. Fusible Switch Assemblies, 800 Amperes and Larger: Bolted pressure contact switches. Fuse clips: Designed to accommodate Class L fuses. Provide with shunt trip and ground fault capabilities. I. Molded Case Circuit Breakers: Integral thermal and instantaneous magnetic trip in each pole. 1. Provide circuit breakers UL listed as Type HACR for air conditioning equipment branch circuits. 2. Include shunt trip where indicated. J. Solid-State Molded Case Circuit Breakers: With electronic sensing, timing and tripping circuits for adjustable current settings; UL listed. 1. Ground fault trip, ground fault sensing integral with circuit breaker. 2. Instantaneous trip. 3. Adjustable short time trip. 4. Adjustable long time delay. 5. Adjustable short time delay. 6. Adjustable short time pickup. 7. Stationary mounting. 8. Include shunt trip where indicated. K. Circuit breakers 1200 Amp and Greater: Provide breaker with energy-reducing maintenance switching with local status indicator per CEC Article (B). L. Switchboard Circuit Breakers: Rated for 100 percent current flow upstream of branch circuit panelboards, including panelboards fed via intermediary step-down transformers. M. Ground Fault Sensor: Residual ground fault type. N. Metering Transformer Compartment: For utility company's use; compartment size, bus spacing and drilling, door, and locking and sealing requirements in accordance with utility company's requirements. O. Utility Pull Section: 1. Width as shown on drawings. Depth and height to match switchboard. 2. Arrange as shown on drawings Page 2

3 P. Future Provisions: Fully equip spaces for future devices with bussing and bus connections, suitably insulated and braced for short circuit currents. Provide continuous current rating as indicated. Q. Pull Box: Removable top and sides, same construction as switchboard. 1. Size as shown on drawings. 2. Provide insulating, fire-resistive bottom with separate openings for each circuit to pass into switchboard. R. Enclosure: NEMA Type 1 - Indoor. 1. Align sections as shown on drawings. 2. Finish: Manufacturer's standard light gray enamel over external surfaces. Coat internal surfaces with minimum one coat corrosion-resisting paint, or plate with cadmium or zinc. 3. Removable front covers: Screw attached. 4. Provide removable hinge pins on hinged doors. 5. Provide full height barriers between sections. 6. Mimic Bus: Showing bussing, connections and devices in single line form on the front panels of the switchboard. a. Use blue factory painting. b. Use plastic strips. c. Fasten strips flat against the panel face with screws or rivets. S. Surge Protective Device: Provide for emergency distribution systems equipment as required per NEC Article COMMERCIAL METERING A. Comply with requirements of 2.02 above. B. Tested and UL Listed for use as multi-metering system. C. Meet EUSERC requirements. D. Integrated Equipment Rating: Provide fully rated integrated equipment rating greater than the available fault current. Series rated switchboards are not acceptable. Reference drawings for available fault current. If drawings do not have available fault current shown, then coordinate with serving electrical utility. E. Meter Sockets/Branch Devices: 1. Provide meter sockets per utility company requirements. 2. Sockets rated 200 amp continuous duty. 3. Prewired circuit breaker branch device meter socket combination. 4. Provide thermostatically controlled electric heaters in each section, sized to prevent condensation under expected weather conditions at project site. 5. Provide terminals for separate connection of heater power circuit. F. Circuit breakers 1200 Amp and Greater: Provide breaker with energy-reducing maintenance switching with local status indicator per CEC Article (B). 2.4 NON-UTILITY POWER METERS (MICROPROCESSOR-BASED METERING EQUIPMENT) A. Power Xpert Branch Circuit Monitor 1. Power monitoring shall be provided on all breakers within the main distribution switchgear. 2. The main breaker meter shall be Eaton PowerXpert 4000 or approved equal Page 3

4 3. Sub breaker meters shall be Eaton Power IQ 250 or approved equal. 4. Power meters shall have certified revenue accuracy as per ANSI C12.20 and IEC class 0.5S or better. 5. The meter and associated instrument transformers shall provide accuracy of +/- 1 percent over the range of 5 percent to 100 percent of rated current or voltage, +/- 2 percent over the range of 5 percent to 100 percent of rated power. 6. Where shown on the drawings, supply a UL listed microprocessor-based Branch Circuit Monitoring System (PXBCM), or approved equal having the specified features. This system shall consist of meter base, and meter module(s) as described below. 7. The Branch Circuit Monitor shall measure the following operational data for up to 84 branch load circuits: a. Forward and Reverse kwh. b. Watts, VA, Amps, Power Factor. c. Present and Peak demand readings for Amps, Forward and Reverse Watts. d. Maximum Watts, VA, Amps. 8. The Branch Circuit Monitor shall support alarms for current that can be set based on percent of breaker rating and alarms for voltage based on percent of nominal voltage. a. High, High-High, Low, Low-Low non-latching alarms for current. b. High and Low latching alarms for current, resettable via Modbus or the WEB interface. c. High and Low latching and non-latching voltage alarms for each meter module input voltage. d. Alarm Status and alarm counters shall be available via Modbus communications. 9. Branch Circuit monitor shall support upgradeable firmware via communications. 10. The Branch Circuit Monitor shall have the following ratings: a. Elevation: 0 to 9843 ft (0 to 3000M). b. Pollution degree: 2 (IEC ). c. Ambient temperature range: -20 degrees C to +70 degrees C (-4 degrees to +158 degrees F). d. Storage temperature range: -40 degrees C to +85 degrees C (-40 degrees F to +185 degrees F). e. Humidity: 5 percent to 95 percent non-condensing. f. PXBCM as a component shall have a NEMA 1 rating. When installed in an enclosure it shall have the same rating as its enclosure NEMA 1. g. Housing Ingress Protection: IP20 as a component, in an enclosure the same as the enclosure. h. CE Mark. i. EMC (Electromagnetic Compatibility): 1) IEC61326: EMI IEC X Level 3. 2) CISPR 11: Class B emissions, CISPR 22 (Ethernet) class B emissions. 3) FCC Part 15 Class B emissions. j. UL/cUL rd Edition. k. EN PXBCM Meter Base: a. Each PXBCM-MB Meter Base shall support connection of up to 4 Meter Modules in either a MMS Strip or MME External configuration monitoring a total of up to 100 single-phase two-wire AC loads, 48 single-phase three-wire AC loads or 32 threephase four-wire AC loads or combinations not to exceed 25 poles per meter module. b. The PXBCM-MB shall be equipped with 4 meter module ports. Each port shall provide control power and communications to either a PXBCM-MMS Meter Module Strip or a PXBCM-MME Meter Module External with a maximum cable length of 28 feet between each Meter Base and each Meter Module Page 4

5 c. Each PXBCM-MB shall support connection to up to 4 PXBCM-MMS Meter Module Strip or 4 PXBCM-MME Meter Module External, or a combination of up to 4 total PXBCM-MMS and PXBCM-MME each meter module with independent single or three phase voltage metering circuits with inputs up to 277V L-N and 480V L-L. d. PXBCM-MB Power Supply shall be rated for VAC L:N +/-10% CAT III, Hz, 6W. e. The PXBCM-MB shall include a 3 terminal RS-485 serial port for Modbus RTU communications and an RJ-45 port for Ethernet communications. The Ethernet port shall support Modbus TCP communications as well as an Embedded WEB server. f. The PXBCM-MB embedded WEB server shall support device configuration for to up to 4 PXBCM-MMS Meter Module Strip or 4 PXBCM-MME Meter Module External, or a combination of up to 4 total PXBCM-MMS and PXBCM-MME and display of up to 100 points of metering data. It shall be possible to save device configuration information to a file for archiving and for uploading to PXBCM. g. The PXBCM-MB shall support connection to a pre-configured HMI via RS-485 serial port. The HMI shall not require configuration. h. The PXBCM-MB shall be equipped with LEDs to indicate communications activity and Device/Alarm Status. An LED shall also indicate if Ethernet is configured for DHCP (automatically assigned IP address) or Fixed IP (manually assigned IP address). The PXBCM-MB shall be equipped with 2 rotary switches to assign Modbus Slave ID i. The PXBCM-MB shall be equipped with security mode switches to enable the device to operate in a secure mode to prevent tampering with device configuration and resets over comms. j. The PXBCM Meter Base shall automatically sense the type of PXBCM Meter Module connected to each of its 4 meter module ports. k. The Configuration Wizard shall support naming and configuration of up 100 virtual meters by assigning 1-3 channels of current to 1, 2 or 3 pole meters. Virtual meters shall aggregate the channel data assigned to each virtual meter and report the aggregated virtual meter values for: 1) Forward and Reverse Energy. 2) Watts, VA, Average Amps and Power Factor. 3) Average and Peak demand for Watts and VA. 12. PXBCM-MMS Meter Module Strip: a. PXBCM-MMS Meter Module Strips shall be available in configurations to mount on either the left or right of a panelboard and contain 9, 15, or 21 CTs. Four additional 333mV connections shall be provided on each PXBCM-MMS for Auxiliary 333mV CT connections which can be used to monitor the panel mains or branch circuits. The MMS shall include both load current and voltage metering circuits providing meter data to the Meter Base. b. The PXBCM Meter Module Strip shall be available with either 9 CTs, 15 CT s or 21 CT s per assembly for factory assembly into Panelboards with 18, 30 or 42 poles. PXBCM MMS CTs shall have be rated for up to 100A continuous current monitoring and designed to mount in an Eaton PRL-1a, PRS-2a or PRL-3e Panelboard with 1 inch breaker pole spacing. c. PXBCM Meter Module Strip 1 inch center CTs shall have a window opening sufficient for insulated Aluminum conductor rated for 100A capacity. d. The PXBCM Meter Module Strip shall support direct connection of one set of 3 phase nominal metering voltage inputs up to 277V L-N and 480V L-L voltages and shall be rated as Cat III. e. The Meter Modules can also monitor voltage in the following configurations: 1) Three phase, four wire wye. 2) Three phase, three wire delta. 3) Three phase, center tapped delta Page 5

6 4) Three phase, three wire. 5) Single phase, two wire. f. Power and Energy metering shall be performed based on the voltage assignment for each 100A strip mounted CT and 333mV Aux CT current input as configured using the embedded WEB server. g. PXBCM MMS Accuracy of kwh metering on branch circuits shall be rated for ANSI C accuracy class as a system, including 100A rated strip mounted solid core current transformers. kwh accuracy for 333mV input auxiliary circuits shall satisfy ANSI C class excluding external 333mV sensor performance. h. The PXBCM MMS shall be UL approved for mounting to the panelboard interior with no interference. Strip placement shall line up 1 inch center CT s with breaker poles and not impede the normal routing of branch circuit conductors in the panel enclosure. i. The PXBCM MMS shall connect to the PXBCM MB using factory supplied cables. 13. PXBCM-MME Meter Module External: a. The PXBCM-MME provides the same metering functionality as the PXBCM-MMS but is used for retrofit or non-uniform/high-mix load applications where the PXBCM-MMS strip mounted 100A CT s cannot be applied. b. The PXBCM Meter Module external shall support 25 channels of current using external 333mV current sensors connected to terminal strips on the PXBCM-MME. c. The PXBCM Meter Module External shall support direct connection of one set of 3 phase nominal metering voltage inputs up to 277V L-N and 480V L-L voltages and shall be rated as Cat III. d. The Meter Modules can also monitor voltage in the following configurations: 1) Three phase, four wire wye. 2) Three phase, three wire delta. 3) Three phase, center tapped delta. 4) Three phase, three wire. 5) Single phase, two wire. e. Power and Energy metering shall be performed based on the voltage assignment for each 333mV current sensor input as configured using the embedded WEB server. f. PXBCM MMS Accuracy of kwh metering on 333mV input circuits shall satisfy ANSI C class excluding external 333mV sensor performance. 14. Optional HMI Display shall display data for all configured sub-meters. a. HMI configuration shall not be required for each sub-meter. The HMI shall discover the configuration information automatically. b. Displayed information shall include: 1) Sub-meter name, current, voltage, energy consumption, demand, and power factor for up to 100 load circuits. 2) Aggregated Power and Energy readings for any 1, 2 or 3 pole meters. END OF SECTION Page 6