GE Unveils World’s 1st 420 kV SF6-free g3 Circuit-Breaker for Gas
https://www.businesswire.com/news/home/20220329005104/en/GE-Unveils-World%E2%80%99s-1st-420-kV-SF6-free-g3-Circuit-Breaker-for-Gas-Insulated-Substations
Mar 29, 2022 · GE’s g³ 420 kV gas-insulated substation (GIS) circuit-breaker prototype demonstrates that g³ technology can be used at Europe’s highest voltage level, as well as other global voltage levels
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