How to Use a Portable SF6 Gas Detector for Circuit Breaker Preventive Maintenance
Ravindra Ambegaonkar
Sulfur hexafluoride (SF6) is the dominant insulating medium in high-voltage circuit breakers and gas-insulated switchgear (GIS) across North American utilities — prized for its dielectric strength and arc-quenching performance. But SF6 carries serious environmental weight: it is 23,500 times more potent than CO₂ as a greenhouse gas. In the US, EPA Subpart DD requires annual SF6 emissions reporting backed by verifiable leak data. In California, CARB's GIE Regulation adds facility-level emission r