Yes, you can use the electricity after you buy it with the card.
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1, the card meter is also known as the IC card meter, the internal is composed of the base table, the main control single chip microcomputer chip, digital display, relay switch, ESAM module and IC card interface.
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2, the user needs to pay for electricity in the power supply department, the purchased electricity is written into the user's power card on the sale of the motor, and the power card is passed to the meter, and the power card can be encrypted several times to ensure the reliable use of the user. When the purchased power is used up, the in-meter relay will automatically cut off the power supply circuit.
3, the working principle: voltage sampling is completed by the voltage divider, current sampling is completed by the sampling resistance, the voltage and current signal after sampling is converted from the multiplier to the power signal, after V\/T transformation, promote the work of the meter, and the pulse signal is input to the single-chip microcomputer system.