Capacitive transition and voltage control device for testing fault of power cable

The invention provides a capacitive transition and voltage control device for testing the fault of a power cable and belongs to the field of cable fault testing devices. The device is characterized by comprising a static polar disc (6) and a movable polar disc (5). A capacitive plug-in assembly (12) and a plurality of voltage change-over switches are fixedly arranged on the static polar disc (6). Multiple sets of connection assemblies, fittingly connected with the capacitive plug-in assembly in the plug-in manner, and guide posts (29) used for triggering the voltage change-over switches, are arranged on the movable polar disc (5). Through pulling up, rotating and pressing down the movable polar disc (5), the plug-in operation of the capacitive plug-in assembly (12) on the static polar disc (6) and the triggering effect of the voltage change-over switches are realized. According to the technical scheme of the invention, in the capacitive transition and voltage control device for testing the fault of the power cable, the plug-in state of the static polar disc and the movable polar disc is realized through the rotating and plugging process. Meanwhile, the transition of the capacitance and the transition of the test voltage during the cable testing process are realized. Therefore, the device can be used for testing the faults of cables of different types and different levels.