Product information The EconiQ ELK-04, 145 kV is the most robust SF6-free gas-insulated switchgear (GIS). It combines a low carbon footprint, superior reliability, and low life cycle costs in a flexible product layout. EconiQ ELK-04, 145 kV is a sustainable and eco-efficient switchgear that has proven capabilities to reduce the CO2 equivalent (CO2 eq) emissions during the complete life cycle of the product, compared to conventional SF6 and other SF6-free technologies. The EconiQ ELK-04, 145 kV uses a gas-mixture of carbon dioxide (CO2, 86.5%), oxygen (O2, 10%) and small amounts of fluoronitrile (C4-FN, 3.5%) that delivers significantly lower life cycle assessment (LCA) ratings over the lifetime of the equipment. The eco-efficient equipment is based on the solid legacy of ELK-04, 145 kV, which has the largest installed base of any sub-transmission GIS in the world. It uses the same proven gas-circuit breaker technology that has been utilized for decades in transmission systems. The new SF6-free EconiQ ELK-04, 145 kV is the most robust and reliable eco-efficient GIS solution on the market to fulfil rigorous high-voltage engineering requirements. It offers easy operation at high-performance ratings and broad flexibility for optimizing substation layouts and reducing the carbon footprint. EconiQ is Hitachi Energy’s eco-efficient portfolio for sustainability, where products, services and solutions are proven to deliver exceptional environmental performance. Benefits of eco-efficient technology • Most reliable eco-efficient GIS solution in the market • No risk of accidental leakage of SF6 • Excellent environmental performance due to the minimum use of material Ease of gas handling • A standard eco-efficient insulation gas for high-voltage equipment will enable the industry to adopt a standardized approach from sub-transmission to ultra-high voltage • Standard service concept and auxiliary equipment Superior quality and robustness • Exceptional engineering design • Based on well-proven and reliable gas circuit breaker technology

EconiQ ELK-04, 145 kV double busbar bay 1. Circuit-breaker 2. Disconnector and earthing switch (busbar) 5. Disconnector and earthing switch (feeder) 6. Make-proof earthing switch 8. Local control cubicle (LCC) Performance data - EconiQ ELK-04, 145 kV Rated voltage kV Rated short-duration power-frequency withstand voltage kV Rated short-duration power-frequency withstand voltage across isolating distance kV Rated lightning impulse withstand voltage kV Rated lightning impulse withstand voltage across isolating distance kV Rated normal current A Rated short-time withstand current kA Rated peak withstand...