Type GM38 metal-clad air-insulated switchgear can meet almost any switchgear application from 23 kV through 38 kV. The horizontal drawout vacuum circuit breakers occupy the lower cell with voltage transformers (VTs) or drawout fuses available in the upper cell. The lower cell may be used for auxiliaries, such as VTs, a control power transformer (CPT) or drawout fuses. Two types of outdoor housing are offered: non-walk-in and Shelter-Clad.
Type GM38 switchgear features include:
One-high construction
Universal spare circuit breaker
Designed for up to 50 full-fault interruptions
Closed door racking
Uses the latest developments in vacuum interrupter technology
Horizontal drawout type 38-3AH3 vacuum circuit breaker with type 3AH3 operating mechanism
Common type 3AH3 operator platform for all ratings
Over 60,000 type 3AH3 operators produced since 1998
Highly reliable vacuum interrupters-estimated MTTF over 57,000 years
Three-cycle interrupting time (optional)
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
Floor rollout circuit breaker in lower cell without a dolly
Visible secondary disconnect
Pair with Siemens protective relays to match any typical application
Meets or exceeds the latest ANSI, IEEE and NEMA standards
UL Listing available for 40 kA rating