Monitoring system for grounding leakage current of high-voltage cable in ring main unit

The invention discloses a high-voltage cable grounding leakage current monitoring system in a ring main unit, and the system at least comprises a zero-sequence mutual inductor which is disposed at the lower wire outlet end of a cable in the ring main unit and is used for measuring the zero-sequence current of the cable; the temperature measuring module is arranged in the ring main unit and is used for measuring the temperature in the ring main unit; the vibration module is arranged in the ring main unit and used for measuring vibration in the ring main unit; the control device is used for receiving and processing signals of the zero sequence mutual inductor, the temperature measurement module and the vibration module; the alarm module is controlled by the control device and is used for carrying out sound-light alarm when the zero-sequence current value, the temperature in the cabinet and the vibration value exceed preset threshold values; the remote communication module is controlled by the control device and