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Gas-insulated switchgear (GIS) ELK-04, 145 kV, EconiQ™

Eco-efficient modular solution for reliable energy supply

ELK-04, 145 kV, EconiQ is the most robust SF6-free gas-insulated switchgear (GIS). It combines a low carbon footprint, superior reliability and low lifecycle costs in a flexible product layout.

It is sustainable and eco-efficient product proven to remove over 80 percent of the CO2 equivalent (CO2 eq) emissions during the complete lifecycle of the product, compared to the SF6 solution.

Based on the well-known modular design of ELK-04 with the largest installed base of any sub-transmission GIS worldwide. It offers easy operation at high-performance ratings and broad flexibility for optimizing substation layouts.

ELK-04, 145 kV, EconiQ is using a gas-mixture of Fluoronitriles (C4-FN), Carbon dioxide (CO2) and Oxygen (O2). This mixture essentially eliminates the CO2 equivalent emissions of the insulation medium compared to SF6 gas.

EconiQ is Hitachi ABB Power Grids’ eco-efficient portfolio for sustainability where products, services and solutions are proven to deliver exceptional environmental performance.



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


Why Hitachi ABB Power Grids?

  • Most reliable eco-efficient GIS solution on the market
  • Exceptional engineering design
  • Using a well-proven gas circuit breaker technology
  • Softer switching characteristic of gas circuit breakers with low stress to neighbouring quipment
  • Based on the ELK-04 product family with the largest installed base of any sub-transmission GIS
  • Earthquake resistant up to ground acceleration of 1g


Benefits of the eco-efficient technology

  • Future proof to environmental regulations
  • No risk of accidental leakage of SF6
  • Transparent environmental performance, thanks to the detailed product life cycle assessment


Brief performance data

GIS ELK-04, 145 kV, EconiQ  
Rated voltage [kV] 145
Rated short-duration power-frequency withstand voltage [kV] 275
Rated short-duration power-frequency withstand voltage across [kV] 315
Rated lightning impulse withstand voltage [kV] 650
Rated lightning impulse withstand voltage across isolating distance [kV] 750
Rated normal current [A] 3150
Rated short-time withstand current [kA] 40
Rated duration of short-circuit [s] 3
Rated peak withstand current [kA] 108
Rated operating sequence O-CO

Downloads for ELK-04, 145 kV, EconiQ

ELK-04, 145 kV, EconiQ

2-pages, product flyer

Ingénieur de centrale électrique
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