The ZW8-12(G) series outdoor high-voltage vacuum circuit breakers are outdoor high-voltage switchgear rated at 12kV, for three-phase AC 50Hz systems. They are primarily used for opening and closing the load current, overload current, and short-circuit current in rural, urban, and small-scale power systems. The overall structure of this product is:

Three-phase in one box, with three-phase vacuum interrupters housed in a metal box, utilizing SMC insulating material for phase-to-phase and phase-to-earth insulation, offering reliable performance and high insulation strength. The ZW8-12 (G) is a combination of a ZW8-12 circuit breaker and a disconnecting switch, known as a combination circuit breaker, which can be used as a sectioning switch.

The operation mechanism of this series, the CT23 type spring energy storage actuator, is available in both electric and manual versions.