The ZW32-12 type primary and secondary integrated circuit breaker (hereinafter referred to as the circuit breaker) is a new product developed by our company according to the requirements of the State Grid-Secondary Integrated Pole Switch for access to the grid. The circuit breaker meets the requirements of the State Grid-Primary and Secondary Integrated Pole Switch, and has the advantages of compact structure, reasonable layout, and complete functions. All indicators of the circuit breaker meet the requirements of the State Grid-Primary and Secondary Integrated Pole Switch, and have passed the primary and secondary integration special test of the China Electric Power Research Institute Co., Ltd. The circuit breaker adopts a unified parameter set of phase sequence, zero sequence voltage; phase sequence, zero sequence current and power supply integrated sensor cast one-piece pole, with the characteristics of wide measurement range, high measurement accuracy, high reliability, and three-in-one measurement, power supply, and protection. In conjunction with the primary and secondary integrated feeder terminal, it can quickly and accurately determine various line faults.