Generator Circuit Breaker Compartment

The Generator circuit breaker (GCB) compartment provides on-line isolation in the main power circuit between the generator and generator transformer using a vacuum or SF6 draw-out circuit breaker. Metal enclosed switchgear compartment houses both control and protection system components. Powergear has also designed mobile cubicles housing line side and neutral side bus bars along with Generator Circuit Breaker and corresponding equipment for metering and protection. Mobile GCB cubicles are mounted on a trailer and can be used for short term mobile power plants.

Generator Circuit Breaker Cubicle


  • Fully compartmentalized
  • Draw out and fixed types
  • Vacuum or SF6 circuit breaker for disconnection during fault condition
  • Non Draw-out and Draw-out type Potential Transformers
  • Operating aisle (if required)
  • Power connection by Busducts or by cables
  • Fire protection system (if required)
  • Off-load isolators and Earth switches
  • Aluminium or Copper conductors with Silver plated joints
  • Forced air-cooled option for higher current rating
  • Houses Current Transformers, Potential Transformers, Surge Arresters, Surge Capacitors etc.


  • Voltages up to 24 kV
  • Continuous current up to 10,000 Amps
  • Multiple short circuit ratings as required
  • BIL up to 125 kV