- Stock number:
- Electrical Power
- Nominal voltage class:
- 4.16 kV
- Nominal 3 phase mva class:
- 250 MVA
- Max sym. interrupting capability:
- 36 kA
- Close & latching capability (rms):
- 58 kA
- Rated withstand test voltage (bil):
- 60 kV
- Rated withstand test voltage (rms):
- 19 kV
- Close & latching capability (crest):
- 97 kA
- Distribution panels
- Circuit breakers, fuses, switchgear
ITEM 1: MV Switch:
1 - Group of Siemens type GM Indoor Metal-Clad switchgear with type GMI vacuum circuit breakers rated 5KV, 250MVA nominal, 3 phase, 3 wire, 60 hertz.
The switchgear and vacuum circuit breakers are engineered, manufactured and tested at
the Raleigh factory of Siemens Power Transmission & Distribution, Inc. This factory is ISO 9001 certified.
The vacuum circuit breakers are type 5-GMI-250, with ratings in accordance with ANSI C37.06-2000.
Nominal 3 phase MVA Class: 250 MVA
Nominal Voltage Class: 4.16 kV
Rated Withstand Test Voltage (RMS): 19 kV
Rated Withstand Test Voltage (BIL): 60 kV
Rated Short Circuit Current (at max kV): 29 kA
Max Sym. Interrupting Capability: 36 kA
Close & Latching Capability (RMS): 58 kA
Close & Latching Capability (Crest): 97 kA
The control voltage is 120 volts ac, from an external source. A capacitor trip device is provided for each circuit breaker.
The switchgear is arranged in a 2-high configuration, with two cells per vertical section. The circuit breakers are "floor roll-out" which permits convenient insertion and withdrawal of the vacuum ci
cuit breakers without the use of lift truck or drawout rails.
NOTE: Medium voltage switchgear is opposite orientation to the drawings for medium voltage switchgear.
The switchgear consists of 2 vertical sections and include the following functional cells:
1 - Main breaker, 1200A
1 - Incoming Line Auxiliary Cell
1 - MVC transition
The switchgear is arranged with 1200A, 3 phase, 3 wire copper main bus with silver plated joints. The bus is supported on glass polyester insulation. The bus bars is insulated with luidized bed epo
y, with PVC boots for standard joints. The equipment will include a 1/4" x 2" silver plated copper ground bar.
ITEM 2: MV CONTROLS:
1 - Group of Siemens Series 81000 Medium Voltage Control Center built in accordance with Siemens standard construction specifications. Detailed construction features are further described in the Sel
ction and Application Guide VC-9011. Siemens standard construction meets or exceeds NEMA ICS-3 Part 2, UL-347 & NEC (Article 490). The 4160V INDOOR-NEMA 12 Medium Voltage Control Center is equipped
ith, insulated, 1200A, silver-plated, copper main bus and 1/4 inch by 2 inch copper ground bar. The equipment is shipped in convenient shipping sections not exceeding 12 feet in length. The recommend
d aisle space in front of the equipment for proper handling of the contactor is 42 inches.
The following equipment is provided:
1750kVA Transformer feeder
15kVA, 1 phase distribution transformer
3300HP SSRV starters
2600HP SSRV starters
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