Siemens Industry
13.8 kV Generator Circuit Breakers for 10–400 MW Gas Turbines (15 and 24 kV Class)
New Siemens Industry generator circuit breakers for sale — GMSG-GCB, Stationary GCB, and HB3 vacuum designs for 10–400 MW generator applications, rated up to 15 or 24 kV depending on the model.
A generator circuit breaker sits between a generator and its step-up transformer, switching the generator connection and handling generator-source and system-source faults. Siemens offers a range for different generator sizes: drawout GMSG-GCB for 10–80 MW in a GM-SG metal-clad lineup, Stationary GCB for 10–200 MW, and fixed HB3 for 100–400 MW with isolated-phase-bus connections. These are separate breaker designs, not interchangeable ratings. Generator rating, terminal voltage, continuous current, and the fault study determine the appropriate design and configuration. Exact rating and scope confirmed at quote.
Specifications
| Asset type | Generator circuit breaker |
|---|---|
| GMSG-GCB | 10–80 MW generators · 15 kV maximum · up to 4,000 A fan-cooled · up to 63 kA short-time · drawout in GM-SG metal-clad lineup |
| Stationary GCB | 10–200 MW generators · 24 kV maximum · up to 6,000 A · up to 72 kA · stationary vacuum |
| HB3 | 100–400 MW generators · 24 kV maximum · up to 12,500 A · up to 100 kA system-source interrupting · fixed, isolated-phase-bus design |
| Standards | IEEE C37.013 (all three); IEEE C37.013a (Stationary GCB) |
| Selection | Choose the design by generator rating, terminal voltage, and fault study at quote |
| Condition | New |
Specifications shown are headline figures. Confirm full configuration details when you request a quote.
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