DDSY866 Single phase electronic prepaid energy meter (Radio frequency water and electricity one card)

Purpose, Characteristics, Functions, and Adaptability Range

• The DDSY866 electronic single-phase prepaid energy meter adopts the most advanced application specific integrated circuit design and is manufactured using fully automatic surface mount (SMT) production technology. The circuit design and component selection of the electric energy meter are based on a large environmental tolerance, which can ensure long-term stable operation of the whole machine, high precision, high overload, low power consumption, and high reliability performance. Adopting advanced intelligent IC card technology that meets international standards to achieve prepaid payment, with built-in magnetic holding relay. By controlling the relay to control the on and off of the load, the function of urging users to buy electricity before using it can be achieved.

• The product meets all technical requirements of GB/T17215.321-2008 "Level 1 and Level 2 Static AC Active Energy Meters" and GB/T 18460.3-2001 "IC Card Prepaid Electricity Sales System Part 3: Prepaid Energy Meters".

Specifications and main technical parameters

• Specifications

  model	accuracy	Specifications	Remarks
  DDSY866	one	220V，5(20)A、5(60)A、10(40)A、10(60)A	Special specifications can be customized according to requirements.
  	/
  	two

  
  

• Basic error

  Load current value	power factor	Percentage error limit (%)
  		Level 1.0	Level 2.0
  0.05Ib≤I＜0.1Ib	one	±1.5	±2.5
  0.1Ib≤I≤Imax		±1.0	±2.0
  0.1Ib≤I＜0.2Ib	0.5L	±1.5	±2.5
  	0.8C	±1.5	——
  0.2Ib≤I≤Imax	0.5L	±1.0	±2.0
  	0.8C	±1.0	——

  Note: Ib is the calibration current, and Imax is the rated maximum current.

  
  

• Starting current: Under rated voltage, rated frequency, and power conditions, the first level meter is 0.004Ib and the second level meter is 0.005Ib, and the meter can operate normally.

• Submersion: When there is no current in the circuit of the electric meter and the voltage applied to the circuit is 115% of the rated value, the output pulse should not exceed one.

• Power consumption: ≤ 2W, 5VA

• Power failure data storage time>10 years

Main structure and working principle

• main structure

  The shell is made of flame-retardant material, which is sturdy, sealed, and has good shielding properties.

• Working Principle Diagram

  The electric energy meter obtains voltage sampling signals from the voltage divider, current sampling signals from the current divider, voltage current product signals from the multiplier, and then generates a counting pulse with frequency proportional to the product of voltage and current through frequency conversion.

  The working principle diagram of the electric energy meter is as follows:

  
  

• data processing

  The electric energy metering pulse is sent to the CPU for processing through a photoelectric coupler, and after calculation, it is stored in a non-volatile EEPROM. The information system is managed by a computer, and through an IC card reader/writer, a certain amount of electricity and monitoring requirements are written into the IC card input table of the microprocessor system. After being processed by the CPU, it provides display, alarm, and cut-off status signals.

Installation and Usage

• 1. The electricity meter has been inspected and qualified before leaving the factory, and sealed with a lead seal before installation and use. If there is no lead seal or it has been stored for too long, relevant departments should be asked to re verify and seal it before installation and use.

• 2. The electric meter should be installed in a dry and ventilated place, and the bottom plate for installing the electric meter should be fixed on a sturdy, fire-resistant, and vibration resistant wall. The height of the electric meter is about 1.8 meters.

• 3. Install and wire according to Figure 1 and Figure 2, tighten the wiring screws, and secure the connecting plate inside the terminal box.

• 4. The reading of an electric meter connected through a transformer must be multiplied by the transformation ratio to obtain the actual amount of electrical energy.

• 5. One table, one card: The IC card held by the user cannot be exchanged. In case of loss, a replacement card should be purchased from the power supply department (sales office).

• 6. Preparation for purchasing electricity: Before purchasing electricity, users must insert their IC card into the electricity meter once to facilitate the return of data from the meter to the computer database.

• 7. Electricity purchase method: When selling electricity, insert the IC card into the IC card reader and operate the computer to encrypt the user ID and other information into the IC card.

• 8. Electricity card usage: Insert the purchased electricity card into the card slot. If it is a valid purchased electricity card, the meter will automatically read the data into the meter and remove the card. Please keep it properly.

• 9. Operation display: During the operation of the electricity meter, it alternately displays the remaining electricity and total electricity consumption in the meter.

• 10. Overcapacity alarm: During the operation of the electricity meter, if the "alarm indicator light" flashes rapidly, it warns the user that the electricity has been exceeded. If the meter is set to the over capacity power-off limit mode, after 30 seconds of over capacity power consumption, it will be tripped for 3 minutes and the countdown display (180 seconds) will show the time to restore power supply; If the user inserts the card and responds, the power supply can be immediately restored.

• 11. Fault declaration: When the remaining power is displayed as zero or negative, a "trip" prompt will be displayed. If the meter continues to operate, the user should immediately purchase electricity and proactively report the situation to the power supply department.

Transportation, storage, and warranty period

• 1. The table should not be subjected to severe impact during transportation and unpacking, and should be transported and stored in accordance with GB/T15464-1995 "Technical Conditions for Packaging of Instruments and Meters".

• 2. The energy meter should be stored in its original packaging in an environment with an ambient temperature of -25 ℃ to+55 ℃, a relative humidity not exceeding 85%, and no corrosive gases in the air. When storing electric energy meters on shelves, the stacking height of the entire box should not exceed 5 boxes, and the stacking height of a single packaged electric energy meter after unpacking should not exceed 10.

• 3. Within 18 months from the date of manufacture, if the electric meter complies with the requirements specified in this manual and is found to not meet the technical requirements with intact lead seals at the manufacturer, the manufacturer will provide free repair or replacement.

Outline drawing

wiring diagram

(For reference only, subject to actual conditions)