Digits Single Phase Prepaid Energy Meter Smart Card Watt Hour Meter Prepaid Function

1. General:

Traditional prepaid electric meter is normally working by the means of Multi-Card One Meter, electricity consumption measurement or No Card to deduct the purchased electricity (unit: kWh ) after being inserted into IC Card. However, the price fluctuation of electricity market which cannot reflect in the purchased electricity will increase the losses of Power Company.

For this purpose, a new designed prepaid electric meter Model No. DDSY150 D/F/A issued by Radarking adopts the electricity fee ( Unit: CNY) way, that is, when the fee is transmitted into through Client IC Card and the meter will deduct the price of electricity ( 0.1kWh as base ) according to the unit price, which is set on the IC Card to be transferred into the meter. When the electricity rate changes, the unit price of electricity in the meter will also be changed through the communication medium IC card that the modified unit price are written into from the vending system.

2. Function and Features:

● EnergyMeasurement

Total and time-sharing forward active & reactiveenergy measurement

Total and time-sharing reverse active & reactiveenergy measurement

Save last one to sixteen months energy data

● IC Card TransferSpecification

Credit data transfered from a point of sale (POS) orvending system is made into IC card using

the Standard Transfer Specification(STS) encryption techniques, which comply with IEC62055 protocol

● Load control function

When the residual energyis 0 or the allowable overdraft that both sides agreed, this meter will

sendout power-off signal to have load switch cut off power.

The power will berecovered automatically after inputting new purchased energy amount.

● Programmable low creditwarning

The meter can beprogrammed for setting user credit warning threshold,

When the meter's residualenergy is equal to credit warning threshold, the meter will start theaudio & video warning function in a way of warning light flashing

● Tamper detection

With event recording function (includingcover-opening event, tamper event and power failure event)

● Optical port interface

Communication standards DL/T645-2007, 1200bps forcommunication

Support IEC62056-21protocol

● RS-485 serial interface

Communication standards DL/T645-2007, 2400bps forcommunication

SupportIEC62056(DLMS/COSEM) protocol

● LCD display

Number of digits value field Up to 8

Digit size 4x10mm

3. Main Technical Parameters:

4. Display and Appreance:

Safety precautions:
＊ Do not connect the meter to a 3 phase - 415V AC - network.
＊ Place the meter only in dry surroundings.
＊ Make sure the used wires are suitable for the max current the meter can measure.
＊ Do not touch the meter connecting clamps directly with your bare hands, with metal, blank wire or other material as you will have the chance of an electricity shock and a possible chance for health damage.
＊ Make sure the protection cover is placed after installation and has been sealed.
＊ Installation, maintenance and repair should only be done by a certified electrician.
＊ Never break the seals or open the front cover as this might influence the functionality of the meter.
＊ Do not mount the meter in area's with harm gas, dust, mildew or insects or on unstable surfaces.