The design and testing of gas-insulated metalclad switchgear and its application to EHV substations

The authors describe the design and testing of gas-insulated metalclad switchgear (GIS) which use SF/sub 6/ as an insulant. The switchgear today extends from 66 to 800 kV and is often used in EHV substations. High-frequency transients and earthing of GIS is also discussed and it is compared with open-terminal switchgear.<
>