Main structure, working principle and installation method of prepaid energy meter
Shandong University of Science and Technology Zhongtian Electronics Co., Ltd. specializes in the production and sales of pre-paid energy meters, DF multi-user smart meters, multi-user energy meters, electronic meters, apartment ** meters, high-current centralized meters, and pre-paid energy meters. .
I. The main structure and working principle of prepaid energy meters
The electronic components of the prepaid energy meter are installed on the printed circuit board (PCB). The upper cover is fixed with screws. One of them can be sealed with lead. The terminal button cover is fixed with two special screws and can be sealed with lead. .
The working principle of the energy meter: It is completed by two main functional blocks, one is a measurement system and the other is a dedicated circuit processing system. The measurement system is a three-phase electronic energy meter. The working principle is: voltage sampling is performed by a voltage divider and current sampling is performed by a transformer. The sampled voltage and current signals are converted by a four-quadrant analog multiplier to a success rate signal. The user needs to pay for electricity at the electricity sales department of the power supply department. The purchased electricity is written into the user's electricity card on the motor for sale, and the electricity card is passed to the energy meter. The high security of card encryption can protect users' reliable use. When the purchased power is used up, the relay in the meter will automatically cut off the power supply circuit.
Installation method of pre-paid energy meter
The upper end of the power meter base has hook screw holes, which can be fixed with M4 hook screws. The lower part of the power meter has two mounting holes, which can be fixed on the wiring board with M4 × 10 or M4 × 12 screws. , The recommended installation height is about 1.8 meters, no corrosive gases in the air.
The energy meter should be wired according to the wiring diagram. ** Use copper wires or copper terminals to connect.