Single phase IC card intelligent prepayment meter

一、working principle

Users hold IC cards to the power supply department to pay for electricity purchase,The power supply department writes the power purchase into the IC card with the power sale management machine,The user can supply power by inserting the IC card into the socket of electric meter,When the remaining power in the meter is equal to the alarm power, the switch will be switched off,At this time, the user can restore the power supply by inserting the IC card; when the remaining power is zero, the power will be automatically switched off, and the user must pay the card again to purchase electricity before the power can be recovered.

二、Main features

1、Mechanical word wheel and LED dual display, to avoid user disputes in any case.
2、Use U.S.A Microchip Single chip microcomputer and ATMEL Nonvolatile IC memory and other imported components，The reliability of the product is guaranteed、Ease of use and security.
3、One An electric meter One Electric card, The IC cards of different users do not work in each other's tables.
4、IC cards of different power supply departments cannot be used universally.
5、The IC card transmits data in both directions and sends back the electricity data in the meter through the IC card, which is convenient for management.
6、When there is reverse connection stealing electricity, the same record of electricity, with a certain anti stealing function.
7、The electricity selling management machine can sell electricity separately or in network with microcomputer.

三、Technical parameter

1、Accuracy grade: 1.0.
2、Basic current IB (rated maximum current Imax): 5 (20) A, 10 (40) A and 15 (60)A.。
3、Meter constant: 3200 imp / KWH.
4、Reference voltage: 220V.
5、Reference frequency: 60Hz.
6、Working voltage range: 220 ± 20% VAC.
7、The power consumption is less than 0.5W.
8、Environmental working conditions: - 20 ℃ - + 55 ℃, relative humidity not more than 85% (+ 25 ℃).
9、In case of power failure, the data in the table can be saved for 100 years, and the IC card can be inserted more than 100000 times.
10、Starting: under the conditions of reference voltage, reference frequency and COSф = 1.0, when the load current is 0.5% IB, the sampling indicator light of the watt hour meter can flash continuously.
11、when the meter is applying 115% of the rated voltage and the current circuit is disconnected, the sampling indicator of the meter does not flash.
12、Insulation: all lines of electric energy meter can withstand pulse voltage with waveform of 1.2g50 μ s and peak value of 6kV for 10 times under the same polarity, without arc discharge and breakdown.
13、The line to ground insulation of electric energy meter shall withstand the actual sinusoidal waveform AC voltage of 2KV with frequency of 50 Hz for one minute.