It is the control and maintenance equipment in three-phase AC high-voltage distribution network with rated voltage of 12KV and 50Hz for the ZW32-12G double-isolation double-outlet outdoor high-voltage vacuum circuit breaker .Coincidence unit is a kind of intelligent device which can realize distribution automation without relying on other control system. The reclosing of circuit breaker (and its operating mechanism), the controller and the control power of three parts, it can in addition to like the breaker points, normal and fault of high-voltage lines, it can also advance the setting of number of times and automatic reclosing in the open circuit fault happens, so that the line is restored for the section in the overlap of the clearance period action good isolation fault line; If the coincidence fails for many times, the coincidence unit will close the lock. At this time, at the other end of the loop network (or "hand in hand" network), the coincidence unit, whose principle is in the closing lock, will remove the locking and self-actuating closing, and the power supply can be restored immediately if the circuit is intact. Power network automation can limit the power failure scope to the minimum after the fault occurs, and has high social and economic benefits. Stupid products with "four remote" remote communication function, can achieve optical fiber, microwave, carrier, radio and GSM/GPRS, CDMA and other communication functions.