Ultrasonic discharge detecting device of medium voltage switch cabinet

The utility model discloses an ultrasonic discharge detecting device of a medium voltage switch cabinet, which is applied to an intelligent electric network. Three ultrasonic detecting units are positioned on different inner surfaces of the switch cabinet respectively and are connected with a monitoring unit body respectively; the monitoring unit body consists of a switch cabinet monitoring unit, a network communication unit, a power unit, a power filter circuit and three signal processing circuits; the outputs of the three ultrasonic detecting units are connected with the three signal processing circuits respectively; the outputs of three signal processing circuits are connected with the switch cabinet monitoring unit respectively; the switch cabinet monitoring unit is connected with the network communication unit; the power unit is connected with the power filter circuit and then connected with the three ultrasonic detecting units respectively; and the power unit is directly connected with the three signal processing circuits, the switch cabinet monitoring unit and the network communication unit respectively. The ultrasonic discharge detecting device of the medium voltage switch cabinet has the functions of online monitoring and network communication, can reliably detect the state of ultrasonic discharge inside the medium voltage switch cabinet and can fuse and position detection results.