ZW32-12 sealed with grounding protection type outdoor high voltage vacuum circuit breaker (hereinafter referred to as the breaker) is applied to three-phase AC 50Hz, rated voltage is 7.2-12kV of outdoor high voltage switch equipment.Circuit breaker in accord with the national standard GB1984 ’high voltage AC circuit breaker” and ‘professional standards JB3855 3.6-40.5kV outdoor AC high-voltage vacuum circuit breaker* and the related IEC standards. For industrial and mining enterprises, power plant and substation for electric equipment control and protection, and the place of frequent operation of rural power grid.Circuit breaker with grounding protection function and repeatedly interrupting and fast reclosing ability.