Upon completion in 2022, the g3 circuit-breaker is expected to be the first SF6-free 420 kV gas-insulated substation circuit-breaker in the world. A circuit-breaker is protective equipment used to ...

Hitachi Energy will install the company’s first eco-efficient EconiQ 420-kV circuit-breaker for Eversource Energy. A game-changing technology that eliminates sulfur hexafluoride (SF6), this will be ...

GE's g³ 420 kV gas-insulated ... a viable SF6-free alternative for high voltage products. GE's 420 kV fully g 3 gas-insulated substation (GIS), which includes the g 3 circuit-breaker, is expected ...