Single-phase carrier pre-charging anti-theft electricity meter box

This utility model associates a single-phase carrier wave and electricity theft-proof prepaid ammeter cabinet, which is used for guarding against electricity theft and alarm. The technical scheme of the cabinet is: the cabinet consists of a cabinet body and an electric bill prepaid ammeter system. After being improved, the cabinet is additionally positioned with a carrier wave communication circuit, a main and loop circuit control circuit, a monitoring circuit. The monitoring circuit is installed with a remote-control signal transmission circuit. The carrier wave communication circuit comprises a coupling transformer, a receiving and transmitting circuit of the carrier wave signal, a modem U1 and a CPU, whereas the control circuit of the main and loop circuit consists of diode D1, D2, relay J1 and audion T1 to T6. The monitoring circuit consists of a coding integrated block, time-base circuit, relay J2, audion, control switch K1, photoelectric cell 3DU, and Potentiometer W. The remote-control signal transmission circuit comprises a coding integrated block and a LBD. This utility model can spot and then stop electricity theft and alarm, thereby minimizing the economic loss and eliminating the hidden danger.