EconiQ® gas-insulated switchgear (GIS) ELK-3, 420 kV

EconiQ GIS ELK-3, 420 kV is a landmark achievement that entirely substitutes sulfur hexafluoride (SF₆) in 420 kV switchgear with an eco-efficient gas mixture. It showcases Hitachi Energy’s commitment to eliminate SF₆ in transmission GIS voltage ratings.

EconiQ GIS ELK-3, 420 kV is the ideal solution for reliable eco-efficient energy supply up to a rated voltage of 420 kV. Based on a few building blocks with standardized dimensions, it supports all typical substation layouts,while offering the same footprint as traditional SF₆ GIS. Thanks to its easy operation, it allows for maximum reliability.

The EconiQ GIS ELK-3, 420 kV operates with an insulation 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.

EconiQ is Hitachi Energy’s 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
• Industry applications

• Minimal product size enabling an easy fit into existing layouts
• Complete single-phase encapsulation
• Robust design proven by electrical endurance class E2
• Earthquake resistant up to ground acceleration of 1g
• Ideal solutions for hydropower plants, offshore wind farms, and container solutions
• Based on the well-proven ELK-3 family and five decades of experience in the GIS technology

• Best in class life-cycle assessment result
• Highly reliable switchgear technology with eco-efficient insulation gas
• No risk of accidental leakage of SF₆