GMSG-GCB draw-out vacuum generator circuit breakers

Why GMSG-GCB?

Use GMSG-GCB draw-out vacuum generator circuit breakers in GM-SG metal-clad switchgear. Protect 10 MW to 80 MW machines at 15 kV, all while meeting IEEE Std C37.013 requirements.

Specialized generator circuit breakers often demand extensive training and complex maintenance. Simplify operations with our GMSG-GCB breakers, sharing a common design with standard non-generator circuit breakers to eliminate extra personnel training. You can also leverage a common 3AH3 operator platform to streamline maintenance and operation with familiar technology.

A hand holds a Siemens remote control pendant with red

Key benefits

Reduce training

Maintain and operate generator circuit breakers with the same procedures as non-generator circuit breakers. Eliminate extra training for your personnel to streamline processes.

Enhance safety

Remotely rack GMSG drawout circuit breakers using the Siemens integrated electrical-racking system (SIERS). Provide additional personnel protection from arc-flash exposure to reduce personal protective equipment needs.

Lower costs

Receive your circuit breaker shipped securely inside its cell. This approach reduces your installation costs and minimizes the potential for transit damage.

Featured capabilities

Robust voltage and current ratings

Use GMSG-GCB vacuum generator circuit breakers, rated 15 kV, for your 10 MW to 80 MW machines. Manage power reliably with short-time withstand current up to 63 kA and continuous current up to 4,000 A fan-cooled.

Proven technology

Our GMSG-GCB circuit breakers are built on the proven service history of our type 3A vacuum circuit breaker family. Meet IEEE Std C37.013 requirements for a robust and tested solution.

Accessible design

Access the circuit breaker operating mechanism from the front for easy maintenance. In addition, you can use closed door racking and floor rollout in the lower cell without a dolly.