Medium-Voltage Metal-Clad Switchgear

Type GM38 (38 kV)

Features & Benefits

Type GM38 38 kV Metal-Clad Switchgear

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


Type GM38 38 kV Metal-Clad Switchgear