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Generator circuit-breaker HECS-R for 80-130 kA

The world’s most compact generator circuit-breaker (GCB)

HECS-R is the world’s most compact GCB, which makes it ideal for replacement and retrofit. The three circuit breaker poles, together with the hydro-mechanical spring drive, supervisory, and control elements, are mounted on a common frame. Phase distance can easily be selected to suit the connected busbar.

Based on the reliable HECS platform, the product group with the most sold GCBs, this breaker supports all power plants between 80-300 MW to increase safety and efficiency. It is suitable for both open and cubicle installations.


  • Replacement and retrofit of power units up to 300 MW
  • Power plants with the smallest space requirements

Why Hitachi Energy?

  • Easy installation with lower installation costs
  • No additional auxiliary equipment
  • Fully type tested according to IEEE C37.013, the worldwide GCB standard 
  • Most compact design
Available options:

Brief performance data

Type HECS-100R HECS-130R
Rated maximum voltage [kV] 25.3 25.3
Rated frequency [Hz] 50 / 60 50 / 60
Rated power frequency withstand voltage [kV] 60 60
Rated lightning impulse withstand voltage [kV] 125 125
Rated normal current [A]: 50 Hz up to 9,000 up to 9,000
Rated normal current [A]: 60 Hz up to 8,600 up to 8,600
Rated short-circuit breaking current [kA] 100 130

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