Testing device suitable for direct current circuit breaker without electronic control board

The utility model discloses a testing device suitable for a DC circuit breaker without an electronic control board. The testing device comprises a power supply module; the input end of the bridge rectifier module is connected with the output end of the power supply module; the first input end of the PLC control unit is connected with the first output end of the bridge rectifier module through a closing switch, the second input end of the PLC control unit is connected with the second output end of the bridge rectifier module through an opening switch, and the third input end of the PLC control unit is connected with the third output end of the bridge rectifier module through a fault tripping switch; the first output end is connected with the direct-current circuit breaker through the first contactor, the second output end is connected with the direct-current circuit breaker through the second contactor, and the third output end is connected with the direct-current circuit breaker through the capacitor module a