The ZW32-12 outdoor high voltage vacuum breaker with primary and secondary fusion, is an outdoor power distribution equipment with a maximum rated voltage of 12kV and three-phase AC 50Hz, mainly used for switching on/off overload current and short circuit current. It is applicable to protection and control in substations and distribution systems of industrial and mining enterprises, as well as places where rural power networks are frequently operated, and can also be used as a section switch for power network, and distribution network automation can be realized after the installation of controller.