AC/DC dual-purpose synchronization detector for vacuum circuit-breaker

The utility model relates to a synchronous detector of an alternating current and direct current dual-purpose vacuum circuit breaker, which can be operated and used conveniently. The synchronous detector comprises a power supply, the power supply comprises a direct current power supply and an alternating current power supply which are mutually connected in parallel, one end of the power supply is connected with an alternating current/direct current converter, a three-phase circuit breaker is connected in a circuit in series, and each phase of the three-phase circuit breaker respectively connected with a contact point and an indicator light. The synchronous detector can select three batteries with 1.5-volt or the 220V alternating current power supply (a transformer is arranged therein, the primary side is 220V and the secondary side is 4.5V) according to the needs. When in use, corresponding yellow, green and red lines are connected on the both sides of the breaker or a vacuum tube, a lever is utilized for bei