GW4 outdoor high-voltage isolator switch is used for outdoor high-voltage electrical equipment with three-phase AC 50Hz. It can be used for the line to be separated under voltage and no load, as well as for the repair of high-voltage busbars, circuit breakers and other electrical equipment and live high-voltage lines. For electrical isolation, it can also be used to open small capacitors or inductor currents.

An insulation distance that meets safety requirements is provided when the knife is in the normal opening position. Widely used in 35-220kV substation.