... Main Features GW7 Series disconnector are 3-pole outdoor HV a.c electric devices, including 40.5kV, 72.5kV, 126kV ... insulator, rotating insulator, moving contact, fixed contact and earthing switch, etc. a. Reasonable structure, excellent performance and reliable service; b. ... 4. Service Condition a. Ambient temperature: -40 to +40 degree centigrade b. Altitude:1000 or 2000m c. Wind Pressure: no ...