It can be widely used in metering for the single-phase AC active power to achieve the function of prepayment power purchase.

                               DDSY single-phase electronic prepayment power meter

The DDSY single-phase electronic prepayment power meter has been selected with the imported single-phase power metering chips, and adopted with the SMT surface mounting and wave-soldering processes for manufacture; the product has the features of electric-larceny proof, high precision, high reliability, high overload, low power consumption, small volume, low weight, etc.; it can be widely used in the time-share metering for the single-phase AC active power of urban and rural residents, plant enterprises, business, etc., to achieve the function of prepayment power purchase.

  Functions and characteristics:

  1. Accurately measure the electricity energy with power in the single-phase AC

  2. Automatically prevent electricity theft, and the electricity with power in the reverse direction will be calculated into that in the positive direction

  3. Broad range, high precision, long life cycle, calibration and maintenance free

  4. Prepaid electricity use with IC card, with built-in big-power magnet-maintained relay to control the power supply and shut down

  5. One card for one household, adopting the special encrypted algorithm, with the good anti-counterfeit performance

  6. Have the alarm function with sound and light, and level-two warning for low electricity volume to buy electricity

  7. When overload, automatic power shutdown and delayed recovery of power supply can be set up

  8. Multi items of display contents, and the display content and time can be randomly set up

  9.Triple data backups, and the data can be saved for ten years without loss after the power failure

  10. Optional memory card, encrypted logic card, CPU card or radio frequency card

  11. Optional display means including measurement instrument, LCD screen and LED digital tube, etc.

  12. Optional communication interfaces including RS485 and infrared, etc. to fulfill the meter recording on the field or from the remote location

  13. Optional function for multi charge rates

  14. Matching can be vicious load Recognition

  Technical parameters:

  Standard: GB/T17215-2002 (IEC61036: 2000, IDT) GB/T18460-2001 DL/T645-1997

  Precision level: Level 1 and 2

  Reference voltage: 220V

  Current specification: 2.5 (10) A, 5 (20) A, 10 (40) A, 5 (40) A, 15 (60) A

  Reference frequency: 50Hz/60Hz

  Working voltage: 0.8Un ~1.2Un   Limit working voltage: 0.7Un ~1.9Un  

  Working temperature : -20°C ~ +55°C  Limit working temperature:-35°C ~ +65°C

  Power consumption: Voltage loop: ≤1W, 5VA    Current loop: ≤1VA (1b)

  Life cycle: >15 years

  Pulse output: Photoelectric isolation-type output without source ,with the pulse width for 80mS±5mS

  Telecom regulations: DL/T645-1997, regulations in various provinces, cities and regions or customized as required by the customer