Generator Circuit Breakers

Generator Circuit Breakers are the ideal solution to protect and simplify the power plant operation, at a very low investment compared to the associated consequences for the Power Plant without such equipment

Whether for installations in new power plants or for refurbishment of existing ones, by using our cutting edge technology in the field of spring operating mechanisms, ALSTOM Grid offers you the perfect Generator Circuit Breaker solution for your specific needs up to 28,000 A.

The FKG1 and FKG2 Circuit breakers provide you with the perfect solution for your specific needs from the circuit breaker alone to a combined solution including disconnector, earthing switch, starting switch, instrument transformers. It offers superior reliability and security up to 1000 MW power plants.

Main Characteritics 

  • Family FKG2 up to 9,500 A as nominal current and 63/80 kA as short circuit
  • Family FKG1 up to 28,000 A as nominal current and 160 kA as short circuit
  • Complies with International standard IEEE-C37.013 and IEC standards

Key Benefits 

  • Completely spring operated mechanisms for utmost reliability
  • Optimized maintenance due to optional monitoring system
  • FKG: more than 15 years of experience
  • Natural cooling up to 17,000 A

As one of leaders in the field of high voltage circuit breaker, ALSTOM Grid has been manufacturing Generator Circuit Breakers since 1972 for Power Plants up to 1,200 MW. More than 1,800 FKG generator circuit breakers have been installed worldwide in applications including Nuclear, Hydraulic, Combined Cycle, Gas and Steam Turbines, Pump-Storage and Thermal Power Plants.

Generator Circuit Breaker (GCB) type PKG and Load Break Switch PG.
PKG generator circuit breakers greatly enhance the conventional design of thermal and nuclear power plants up to 1600 MW by simplifying operations, improving security, and reducing cost. This AREVA T&D air blast generator circuit breaker, combined with additional power plant switchgear, presents a variety of solutions geared to the diverse constraints of operation and power production.

Main Characteristics

  • up to 36 kV
  • up to 275 kA short circuit
  • up to 50,000 A continuous current
  • indoor or outdoor
  • as per IEEE Standards and IEC Standards