three phase smart electricity meter ic card

Specifications

Three phase prepaid meter

Specifications and main technical parameters
1. In accordance with the International standard IEC61036
2. Rated voltage: 220V;
3. Calibrated current: 5(20)A; 10(40)A; 15(60)A; 20(80)A; 30(100)A;
4. Rated frequency: 50Hz;
5. Relative humidity ≤ 85%;
6. Accuracy class: Class 1.0, 2.0;
7. Power consumption of whole machine: Less than 2W;
8. Starting current: 0.4%Ib (class 1.0), 0.5% Ib (class 2.0) basic current;
9. Function of anti-creep: Anti-creep logical design;
10. Data save: Data can be saved equal to or more than 11 years after power off;
12. Service life: More than 10 years
13. Weight: About0.8Kg;

 Functions

 1 Total consumption and remain energy display by LCD

2 Accumulate the electricity purchased

3 Limit maximal power

4 Automatic switch off power when overload

5 Warning when electricity insufficiency

6 Cut off the power when electricity use up

7 Pulse output

8 Operation indicated by pulse LED

Working principles

The meter collects voltage signals from the potentiometer. The current signals collected from the shunt to get multiplying signals through multiplication device, and after frequency converting, get counting pulses, which is in direct ratio with the product of voltage and current.

The counting pulses of electric energy will be sent to CPU for processing through electro-coupling, and be stored in nonvolatile EEPROM after operation. These pulses and information from IC card that been stored with some volume of electricity and data of supervisory demands will be processed by micro processing system in the meter then provide signals of display, warning and cutting-off state etc.

Diagram is as follows: