High Voltage Switchgear and Sulfur Hexafluoride
Background
Moisture in Sulfur Hexafluoride (SF6) an insulating gas can cause rapid and severe deterioration of high-voltage switchgear. During electrical power distribution at transmission voltages (ranging typically from 100 to 400 kV), power switching or load current interruption is a major problem as a result of arcing between the two contact points. The insulation properties of SF6, used to pressurize such switchgear enclosures, ... more
