a gas insulated switchgear(gis) in control building for extra high voltage electrical power substation.

highvoltage circuit breaker switchgear gas insulated power engineering structure facility hexafluoride insulate sf6 disconnect sulfur industrial gis gaseous dielectric line lightning arrester active component distribution electric electrical electricity energy equipment insulation insulator isolator substation switch system transmission ukraine voltage transformer high switchgeargis control building extra substation used industry