ZW8-12 (G) series vacuum circuit breakers are high-voltage outdoor switch equipment with rated voltage of 12KV and three-phase AC 50Hz. They are mainly used to switch off and shut off the load current, overload current and short-circuit current of rural power network, urban power network and small power system. The overall structure of the product is three-phase box type, it is placed in the metal box for three-phase vacuum arc extinguishing chamber, using SMC insulating material to phase insulation and ground insulation, reliable performance, high insulation strength.

ZW8-12G is a combination of ZW8-12 circuit breaker and isolation knife, known as a combination circuit breaker, can be used as a segment switch.

The operating mechanism of this series of products is CT23 spring energy storage operating mechanism, divided into electric and manual two kinds. The circuit breaker has closing inrush current control function, which can meet the control and measurement requirements. With electronic control unit, "Four Telecontrol" monitoring can be realized.