The invention discloses a state monitoring device for a distribution network low-
voltage cable
branch box. The state monitoring device comprises a main control module, a communication module, a switching position monitoring module, an intrusion monitoring module, a temperature and
humidity measuring module, an indicating module, an electrical parameter measuring module, a temperature measuring module and a
power module; a low-power-dissipation MCU is adopted for the main control module and is used for keeping alarm informing for a period of time after a circuit loses power, a communication mode that a
physical layer is LoRa is adopted for the communication module, on this basis,
obstacle avoidance, distance, anti-interference and power dissipation are optimized, and an upper-layer protocolis encapsulated; the electrical parameter measuring module comprises CT, PT and electrical parameter metering unit modules, and the
power module comprises a power supply and a stand-by power supply.By means of the state monitoring device, remote active forewarning on the
branch box is achieved through monitoring and combined analysis of power losing,
overcurrent, leakage protection switching motions of the low-
voltage cable
branch box, over-temperature of busbars, switching cabinet door events and environment anomaly states, problems are timely found and solved, and the working efficiency ofoperation and maintenance personnel and the power supply reliability are improved.