Metal-clad arc-resistant switchgear
Type GM-SG-AR (5 kV - 15 kV)
- Description
- Circuit breaker atings
- Dimensions in inches
- Arc-resistant to IEEE C37.20.7-2007, up to 50 kA, 0.5 sec, accessibility type 2B
- Application flexible exhaust system
- Top-mounted pressure relief channel factory-installed for reduced installation time
- One-high or two-high construction
- Up to 100 full-fault interruptions
- Universal spare circuit breaker
- Interlocks permit insertion of high rating vacuum circuit breaker into lower rated cell but not vice-versa
- Front accessible circuit breaker operating mechanism for ease of maintenance
- Closed-door racking
- Floor rollout circuit breaker in lower cell without a dolly
- Visible secondary disconnect
- Circuit breaker ships inside of cell, thus reducing installation cost and transit damage
- Instrumentation / controls located in a separate compartment isolated from all primary circuit elements
- Pair with Siemens protective relays to match any typical application
- Horizontal drawout type GMSG vacuum circuit breaker with 3AH3 operating mechanism
- Uses the latest developments in vacuum interrupter technology
- Highly reliable vacuum interrupters - MTTF over 42,000 years
- Common 3AH3 operator platform for all ratings
- Over 60,000 3AH3 operators produced since 1998
- 10,000 operations to overhaul
- Three-cycle interrupting time (optional)
- Meets or exceeds the latest ANSI, IEEE and NEMA standards
- UL or C-UL Listing available
cConstant kA basis - ANSI/IEEE C37.06-2000
| Historic "MVA" class | Maximum design voltage kV | Rated inter-rupting kA | Maximum inter-rupting and short-time kA | Voltage range factor | Continuous current [1] | Insulation levels dielectric 60 Hz | Insulation levels dielectric BIL | Close and latch (kA) rms 1.55 KI | Close and latch (kA) peak 2.6 KI |
| - - - - | 4.76 | 40 | 40 | 1.0 | 1,200, 2,000 | 19 | 60 | 62 | 104 |
| - - - - | 4.76 | 50 | 50 | 1.0 | 1,200, 2,000, 3,000 | 19 | 60 | 78 | 130 |
| - - - - | 8.25 | 40 | 40 | 1.0 | 1,200, 2,000, 3,000 | 36 | 95 | 62 | 104 |
| - - - - | 15.0 | 25 | 25 | 1.0 | 1,200, 2,000 | 36 | 95 | 39 | 65 |
| - - - - | 15.0 | 40 | 40 | 1.0 | 1,200, 2,000, 3,000 | 36 | 95 | 62 | 104 |
| - - - - | 15.0 | 50 | 50 | 1.0 | 1,200, 2,000, 3,000 | 36 | 95 | 78 | 130 |
Footnotes:
[1] 4,000 A fan-cooled available, using a 3,000 A circuit breaker together with a modified switchgear structure incorporating fan cooling equipment.
| Type | Width (W) [3] | Height (H) [2] | Depth (D) [4] | Drawout aisle (DA) [1] |
| Indoor | 40 (1,016) | 116.4 (2,957) | 98.5 (2,502) | 72 (1,829) |
Footnotes:
[1] 72 inches (1,829 mm) aisle space recommended and allows room for interchange of circuit breakers. Minimum aisle space required for handling circuit breakers with lift truck is 65 inches (1,651 mm). Minimum aisle space required if all circuit breakers are at floor level is 55 inches (1,397 mm).
[2] No obstructions permitted within 10 inches (254 mm) of top of switchgear structure.
[3] Add 9.0 inches (229 mm) to length of lineup for end trims.
[4] Add 4.5 inches (114 mm) to depth for rear door.
[5] An exhaust system to direct arc fault products outside of the switchgear room is supplied with each lineup of equipment.
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