ZW32-12 type outdoor vacuum circuit breaker (hereinafter referred to as breaker) for the rated voltage 12kV, rated current up to 1250A, three-phase AC 50Hz outdoor distribution equipment. Mainly used for breaking, closing power system load current, overload current and short circuit current; set aside to upgrade the interface, coupled with the automatic control device can automatically recloser and segmentation functions satisfy the biggest distribution network automation requirements; products suitable for rural power, urban and industrial and mining enterprises, such as frequent operation place. ZW32-12G isolation combination switch is composed of vacuum circuit breakers and disconnectors composed 12kV outdoor high voltage switchgear. In addition to a circuit breaker for all purposes, but also to meet the electricity to run the system for a significant overhaul should breaker isolated fracture of the requirements and the breaker body isolation knife reliable electrical and mechanical interlock to ensure the safety during maintenance breaker .