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Generator circuit-breaker HECPS-3/5S for 80-130 kA

Unique solution for pumped storage power plants

The integrated solution HECPS-3/5S is unique in the market providing all functions required by pump storage power plants (PSPP) in one system and from a single manufacturer.

HECPS-3/5S consists of three individual modules: generator circuit-breaker (GCB) module with starting frequency converter (SFC) and back-to-back (BtB) starting switches, 5-phase disconnector, phase reversal module and electrical braking switch.

Based on the modern HECS products group, with short circuit ratings of up to 130 kA and nominal currents of up to 17,500 A, it satisfies the requirements of largest pump storage power plants around the globe.

The system includes circuit-breaker, disconnector, capacitors and control cubicle, and offers a wide selection of additional components, such as earthing switches, current and voltage transformers, and surge arresters. It is delivered fully assembled to minimize the installation and commissioning time at site. The control, monitoring and interlocking functions of the complete system are integrated in single control cubicle.


  • Applications for power plants up to 600 MW
  • Special solution for pumped storage power plants consisting of:
    • GCB module with SFC and BtB starting switches
    • 5-phase disconnector and phase reversal module
    • Electrical Braking switch

Why Hitachi Energy?

  • The only solution worldwide that integrates all PSPP functions in a system provided by a single manufacturer
  • Hitachi Energy integrates control, monitoring and interlocking functions to minimize the installation and commissioning at site with clear responsibility
  • Highest reliability based on the HECS platform
  • Fully type tested according to IEEE C37.013, the worldwide GCB standard 
Available options:

Brief performance data

Rated maximum voltage [kV] 25.3 25.3 25.3
Rated frequency [Hz] 50 / 60 50 / 60 50 / 60
Rated power frequency withstand voltage [kV] 60 / (80) 60 / (80) 60 / (80)
Rated lightning impulse withstand voltage [kV] 125 / (150) 125 / (150) 125 / (150)
Rated normal current [A]: 50 Hz up to 13,500 up to 13,500 up to 17,500
Rated normal current [A]: 60 Hz up to 12,500 up to 12,500 up to 16,500
Rated short-circuit breaking current [kA] 100 130 130

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