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Gas-insulated switchgear ELK-04 up to 170 kV

Modular solution for reliable energy supply

The gas-insulated switchgear ELK-04 is the ideal solution for reliable energy supply up to a rated voltage of 170 kV, a rated normal current up to 4000 A, and a rated short circuit current up to 63 kA. Based on a few building blocks with standardized dimensions, its space saving and modular design offers a small footprint and easy operation at high performance ratings. The ELK-04 offers a high level of flexibility for optimizing substation layouts.


  • Power transmission
  • Integration of renewable power generation units to the grid
  • Offshore and onshore wind power connections

Why Hitachi Energy?

  • Compact footprint with short installation time
  • Indoor and outdoor installation
  • Monitoring, control, protection and communication features for smooth integration into digital substation systems using IEC 61850

Brief performance data

GIS ELK-04    
Rated voltage [kV] 145 170
Rated frequency [Hz] 50/60
Rated short-duration power-frequency withstand voltage (1 min) [kV] 275 325
Rated lightning impulse withstand voltage (1.2/50 µs) [kV] 650 750
Rated normal current – busbar / feeder [A] 3,150 4,000
Rated short circuit-breaking current [kA] 40 63
Rated short-time withstand current (up to 3 s) [kA] 40 63
Rated peak withstand current [kA] 104 164
Bay width [mm] 1,000 1,200
Ambient temperature range [°C] -30 … +40
Installation indoor / outdoor

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