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DTSY three-phase electronic prepayment power meter The DTSY three-phase electronic prepayment power meter has been selected with the imported three-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 three-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 three-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. Automatic inspection for phase voltage, and have the function of indication for phase shortage 5. Automatic inspection for the direction of three-phase current, and have the function for indication of current in reverse direction 6. It can normally work and measure in reverse phase sequence , broken zero wire, power failure in 1 phase or 2 phases 7. Prepaid electricity use with IC card, with built-in big-power magnet-maintained relay to control the power supply and shut down, and also can control the AC contactor or automatic air switch connected from the outside 8. One card for one household, adopting the special encrypted algorithm, with the good anti-counterfeit performance 9. Have the alarm function with sound and light, and level-two warning for low electricity volume to buy electricity 10. When overload, automatic power shutdown and delayed recovery of power supply can be set up 11. Multi items of display contents, and the display content and time can be randomly set up 12.Triple data backups, and the data can be saved for ten years without loss after the power failure 13. Optional memory card, encrypted logic card, CPU card or radio frequency card 14. Optional display means including measurement instrument, LCD screen and LED digital tube, etc. 15. Optional communication interfaces including RS485 and infrared, etc. to fulfill the meter recording on the field or from the remote location 16. Optional function for multi charge rates Technical parameters: Standard: GB/T17215-2002 (IEC61036: 2000, IDT) GB/T18460-2001 DL/T645-1997 Precision level: Level 1 and 2 Reference voltage: 3×57.7V 3×100V 3×220V/380V Current specification: 1.5 (6) A, 5 (20) A, 10 (40) A, 20 (80) A, 15 (60) A, 30(100)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 (Ib) 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 Dimensions: Internal shutdown type: 280×170×95 mm(L×W×H) External shutdown type: 216×143×70 mm(L×W×H)