Yangzhou WANTAI Electric Appliance Co., Ltd.
 Business Services > Processing Services >  Electronic Single-phase Prepaid Energy Meter

Electronic Single-phase Prepaid Energy Meter

Brand Name:
Model Number:
Display Type:
Analog and Digital
Single Phase
Measuring Energy Range:
Accuracy Class:
1.0 2.0
Electronic Single-phase Prepaid Energy Meter
Detailed Description

DDSY520 electronic single-phase prepaid energy meter is a full electronic energy meter with RF card to measure the single-phase


Electronic Single-phase Prepaid Energy Meter

(RF Card)


DDSY520 electronic single-phase prepaid energy meter is a full electronic energy meter with RF card to measure the single-phase AC active power at 50Hz or 60Hz.It can supply electric power only after being repaid by users.When the electric power in the RF card is used up,the power will be cut off automatically. The product adopts advanced microelectronic technology and SMT manufacturing technique,and completely conforms to GB/T17215-2002 standard and GB/T18460.3-2001 standard.



Designed for time-sharing electricity metering of new or reconstructed single-phase user. With prepayment function, it is particularly suitable to solving payment-collecting difficulties in residential area ,organization ,factories ,mines and schools etc..It is preferable in promoting the management level at demand side ,inducting the users to better power consumption style to improve efficiency and electric sources collocation.


Working Principle:

There are two basic function modules in the energy meter separately named energy-metering module and MPU-controlling module.

The energy-metering module adopts advanced special integrated circuit-ADE7755. The two analogue-to-digital converters in ADE7755 digitise the output of current and voltage sensors,and the true power into the load is represented in terms of the equivalent frequency at F1 and F2 output points.The pulse frequency is sent to MPU.

The MPU-controlling module accumulates the consumption power ,processes data,reads or writes RF card,controls magnetism-keeping relay operating and LCD or digester display.


Functions and Features:

·Imported chips with high precision which could precisely calculate active power;

·With reliable start-up and creep performances;

·Adopting hardware logic encrypted RF card as medium for data communication;

·Alarm to reminding users to purchase the electricity when the energy surplus is less than alarm energy value;

·Special circuit against tamper and fraud;

·LCD or LED or digester display;

·Bidirectional active energy measurement;

·Switching-off or buzzer precaution;

·RS485 and infrared communication interface;

·Display of recycled information including accumulated energy value, surplus ,meter constant,meter number,etc.;

·With the protection from harmonic wave and high-frequency pulse interference;

·Two sets of step tariff system;

·Seven kinds of step tariff at most;

·Six step at most;

·Large relay capacity with low power consumption and high reliability;

·Presetting of load value,alrm energy value,maximum load, step tariff,etc.;

·Credit overflow limit;

·Alarming and switching off  when overload;

·Data in meter can be kept for 10 years when there is no power;



Main Techical Parameters:

Accuary class


Rated voltage


Basic current(Ib)/ Max current(Imax)



Rated frequency


Normal operating temperature


Limit operating temperature


Storage temperature


Relative humidity


Power consumption

Voltage Circuit<2W

Current Circuit <5VA

Data store

Date store under no energy 10 years




About 0.9Kg

Service life

>10 years

Meter constant


Start current


Normal operating voltage

0.8Un ~ 1.15Un

Limit operating voltage

0.7Un ~ 1.2Un

Degree of protection


Service life of CPU Card

100000 times

Accuracy of clock


Communication Protocol

DL/T645-1997 or DL/T645-2007

We have a very strict quality controling system which promise that Ungrouped we produce are always of best quality!We can also produce according to your requirement.We promise you with the finest price,high quality and best service.If you have any problems about details please contact us.

Company information:
    Our company name is Yangzhou WANTAI Electric Appliance Co., Ltd. Which established in 2000 . We is an exporter of China (Mainland) Other Processing Services products.    Our products have been sold well in Africa! We are here to promise our prestige and best quality!    To pursue high quality and meet customers' demands are our perpetual promises. We sincerely invite you as our good friends to visit us.Please vist our website at www.wtdq.net and use the contact form for a faster response!
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Send Inquiry to this Supplier
Yangzhou WANTAI Electric Appliance Co., Ltd.
Mr. Jianhua Pan
253 Taiping Road ,Yangzhou City

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