Year1
' , < , Basic current b (rated maximum current):
' , < and
Meter constants / , / (see label for details)
' , <
, Reference voltage:
, Reference frequency:
, Working voltage range:
, Power consumption:
, Environmental working conditions: - ℃ ~ +℃, the relative humidity does not exceed (
', < +℃)
. The data in the energy meter can be saved for years in case of power outage, the number of card swipes
', < more than 10,000 times
, starting: Under the conditions of reference voltage, reference frequency and ф., when
' , < when the load current is .b, the energy meter sampling indicator light can flash continuously
, Latent movement: When the rated voltage is applied to the electric energy meter and the current loop is disconnected,
' , < the sampling indicator light of the electric energy meter does not flash
. Insulation: All circuits of the electric energy meter can withstand the waveform between the case and the meter case. is
' , < , with a peak value of pulse voltage of , under the same polarity, no arc discharge or breakdown will occur
' , < . The circuit-to-ground insulation of the electric energy meter withstands an actual sinusoidal AC voltage with frequency
' , < and lasts for one minute without breakdown
' , < .
' , < 1. Introduction
' , <
Single-phase electronic prepaid energy meter is developed and produced by our company
' , < New A generation of intelligent energy meters, which use high-precision, high-reliability electronic energy meter integrated circuits, combined with prepaid processing electronic modules, to measure frequency
', < The rate is single-phase AC active energy, and the technical indicators comply with
' , < .3 "Special Requirements for Alternating Current Measuring Equipment Part Part:
' ,
', < Communication Protocol for Multi-function Electric Energy Meter". It adopts the most advanced card
' , < technology and craftsmanship in the country, and has the characteristics of accurate measurement, stable precision, safety and confidentiality, reliable performance, complete functions, low power consumption and operation With its advantages such as simplicity, it is an ideal product for my country to reform the electricity consumption system and realize the commercialization of electricity consumption.
' , <
2. Working principle and main features
' , <
. Working principle
The user holds the contactless card (card for short, the same below) to the power supply The department pays to purchase electricity
' , < . The power supply department uses the electricity sales management machine to write the purchased electricity into the card. The user holds the card
' , < and swipes the card in the card reading induction area of the electric energy meter (referred to as swiping the card, next Same as), the electric energy meter can be closed for power supply, and the card can be taken away after power supply. When the remaining power in the electric energy meter is equal to
' , < when the alarm level is set, the electric energy meter will turn off the power. At this time, the user can swipe the card in the sensing area
' , < to resume power supply. When the remaining electric power is zero, The electric energy meter shuts down again and the user
' , < must hold the card to pay for electricity again before he can resume using the supporting host
' , < The machine equipment and corresponding software can be connected through the bus Read the meter address in the electric energy meter
' , < address, relay status, program version number, total usage, remaining power, power purchase
' , < total power, number of power purchases, last power purchase The electric energy meter with valid information series
' , < can also be recharged through the bus with the wireless remote transmission management system to realize the integration of card prepayment and network prepayment functions.
. Main features
, using non-contact card technology, waterproof, moisture-proof, dust-proof, anti-wear, anti-
', < external electromagnetic attack
B. Mechanical character wheel and double display to avoid user disputes under any circumstances
' , <
, single-chip microcomputer and non-volatile memory use imported components to ensure the reliability and ease of the product
' , < Usability and security
, one meter, one card, cards from different users will not work in each other’s energy meters
', <
, cards from different power supply departments cannot be used in common
, the card transmits data in both directions, and the electricity consumption data in the meter is returned through the card, which is convenient for management Function
' , < function
can control the opening and closing of the electric energy meter through the bus method.
' /3//3/ , :
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