G20DT series is produced according to the discharging, clamping, filtering principles, that realized high efficient discharging lightning currents and resistance of EMP shock which caused by lightning currents. It has advantages of multi classes protectio
VS1, as a kind of indoor vaccum circuit breaker, with its advantages of stable performance, rapid reaction and excellent breaking and closing capbility, is widely applied to 10-40.5kV power transmission and distribution system.