ZW32-12 series outdoor high voltage vacuum breaker is produced by Zhejiang Fuladi Power Technology Co., Ltd., used in AC 50Hz,rated voltage 12kV three-phase power system for closing/breaking load current,overcurrent and short-circuit current.the breakercan equip with reclosing controller to identiy break current characteristics and achieve multiple automatic reclosing or faultisolation.Self-provided PT as a power source,it becomes a smart circuit breake able to controlr with signal output of voltage and current.The electronic PT provides power supply and can complete three-stage composite protection of overcurrent delay, inrush current delay, and short-circuit and quick-break.