Voltage monitoring device with fault self-diagnosis function based on NB-lot technology

The utility model relates to a voltage monitoring device with a fault self-diagnosis function based on an NBlot technology, which comprises a cabinet body and a voltage monitor arranged in the cabinetbody, a fault monitoring device is arranged in the cabinet body, the fault monitoring device comprises a displacement monitoring module, a processing module, a communication module and an antenna, and the input end of the processing module is coupled to the displacement monitoring module. The output end of the processing module is coupled to the communication module and transmits a displacement monitoring signal to the communication module, the communication module is connected with the antenna, and the communication module is an NBlot communication module. When the voltage monitor does not carry out data uploading, a worker judges whether the voltage monitor breaks down due to disconnection from a power grid circuit or not according to the data uploaded by the fault monitoring device; and when the voltage monito