ZF27-800 GIS is to meet the northwest 750 kV transmission line project of independent research and development of the 800 kV gas-insulated metal-enclosed switching.The research of ZF27-800 GIS was analyzed
including the key techniques of the breaking system
the insulation system
the drive system and the power system of the 800 kV circuit breaker.The designing technology of GIS’s bus and pass in and out line casing is also described.