Prepaid electricity meter is also called quantitative electricity meter or IC card electricity meter. In addition to the metering function of ordinary electricity meter, it is special that users buy electricity first and can use electricity after buying electricity. If the user does not continue to buy power, the system automatically cuts off the power supply.  Used for measuring ac single-phase active electric energy with rated frequency of 50Hz. Supporting pre-paid electricity sales software to achieve the management function of paying before using electricity.  Advanced microelectronic technology is used for data acquisition, processing and storage, and rf card is used to transmit data. Its performance index conforms to GB/T17215-2002 and GB/T18460.3-2001 standards.  The pre-paid watt-hour meter has the characteristics of small size, high security, high reliability and anti-electricity theft.  

How the prepaid meter works: 

The electric energy meter consists of two main functions: one is the electric energy metering part, which uses a dedicated integrated electric energy metering chip to calculate the voltage and current sampling signals.  

The measurement pulse representing the electric energy is directly used for the electric energy error check, and at the same time, the power is counted for the functional processing part of MCU;  The second is the MCU control part of the microprocessor. According to the power pulse of the metering part of the power calculation, and through the rf card interface for data exchange, while using a wide temperature range of LCD display, And according to the set parameters control magnetic hold relay to control the power consumption of users.

Prepaid electricity meter features:  

1. Adopt large-scale integrated circuit and SMT processing technology to ensure high reliability of products;  

2. Low power consumption of electricity meter, far less than the requirements of national standards   

Voltage line: <=0.7W and 4VA(GB: <=2W and 10VA)   

Current line: <=0.3VA (GB: <=4.0VA)  

3. The single-phase electronic watt-hour meter produced by our company adopts advanced technology to prevent electric theft.  Not only has the protection against meter tilt, external magnetic field, short connection,  

Reverse use of electricity and other ordinary ways of stealing electricity, and has the function of preventing one fire and one ground from stealing electricity;  

4. In the aspect of structure, the anti-electricity stealing end cover is designed to prevent short-circuit electricity stealing;  

5. Wide range of watt-hour meter, ensure more than 6 times of overload   

6. The watt-hour meter has anti-diving logic circuit, applying 125% voltage, the watt-hour meter has no test pulse output;

7. The meter can be started and recorded at 0.4%Ib; 

8. Wide working voltage range of prepaid electricity meter: the electricity meter can still work normally when 380VAC is mistakenly added for a long time.

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