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Gas-insulated switchgear ELK-04 C up to 145 kV

Reliable and compact solution

The gas-insulated switchgear ELK-04 C is the new generation ELK-04 for 145 kV designed to reduce complexity, life cycle costs and environmental impact. Its design yields eco-efficient performance, simplifies planning and installation while improving serviceability.


  • Power transmission
  • Integration of renewable power generation units to the grid
  • Industry applications

Why Hitachi Energy?

  • Eco-efficient, small, lean three-phase enclosures with single-phase insulators
  • Reduces use of SF6 gas by 60 percent compared with predecessor products and features excellent gas tightness for minimum leakage
  • Reduced weight
  • Excellent accessibility, convenient operation
    • Small bay width of 800 mm allows additional access corridors
    • Frontal access to drives for manual operation
  • Compact and modular design
  • Provisions for excellent service continuity during any repair jobs
  • Monitoring, control, protection and communication features for smooth integration into digital substation systems using IEC 61850

Brief performance data

Rated voltage [kV] 145
Rated frequency [Hz] 50/60
Rated short-duration power-frequency withstand voltage (1 min) [kV] 275
Rated lightning impulse withstand voltage (1.2/50 µs) [kV] 650
Rated normal current – busbar / feeder [A] 3,150
Rated short circuit-breaking current [kA] 40
Rated short-time withstand current (up to 3 s) [kA] 40
Rated peak withstand current [kA] 108
Bay width [mm] 800
Ambient temperature range [°C] -30 … +55
Installation indoor / outdoor

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