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3-Phase Static Prepayment Watt-Hour Meter
General introduction:DTSY200-B three-phase static prepayment watt-hour meter is used to measure three-phase active electric energy in the 50Hz AC circuit. Adopting high-accuracy three-phase sampling special purpose chips, the product can carry through sampling measurement and transmit it to intellective microprocessor. After conversion and processing, the electric quantity display and interface control are completed. Data transfer is completed by IC card. Electric quantity and power consumption data are mutually transferred between the meter and electricity selling managemen t system to realize the functions of electric energy measurement and electricity charge prepayment. So, the meter is a necessity for power departments to reform electricity charge method and to achieve the management of prepayment power use.Main technical index:1) Current specifications: 3 x 5(20)A, 3 x 10(40)A, 3 x 15(60)A, 3 x 20(80)A2) Accuracy class: 1.0 class3) Reference voltage: 3 x 220/380V4) Reference frequency: 50Hz5) Operation voltage range 0.9 Un ~ 1.1 Un6) Temperature range in operating environment: -25 ~ +55oC7) Contact capacity of electrical relay while power is turn off: AC 3A /220VMain functions:1) Energy measuring function: the meter can measure and display the user`saccumulative energy charge2) Monitor and control function:a) When the remnant electric quantity is less than the presetting warning quantity1, the meter will display remnant electric quantity at all times to remind the userto purchase electricityb) When the remnant electric quantity is less than the presetting warning quantity2, the meter will turn off power once to remind the user. Three minutes later afterinserting electricity card, the user can manually close breaker outside the meter.Thus, the meter resumes to supply powerc) When the remnant electric quantity reduces to zero, the meter will turn off powerautomaticallyMemory function: the remnant electric quantity and information stored in the meter will not be lost due to power supply failure over a long period.Display function: nixie tube displays the remnant electric quantity (kWh). Watt-hour meter displays the accumulative energy charge.Identification functions: the meter will not work while the non-designated IC card or medium is used.Adding function: when the user insert prepayment card, in which purchased electric quantity is stored, into the meter, the remnant electric quantity will be added to the newly bought electric quantity.Back writing function: when the user inserts prepayment card into the meter, the prepayment watt-hour meter can not only input the newly bought electric quantity into the meter, but also write the information about power consumption back into prepayment card, so that power departments can inspect how the user consumes power.Pulse output function: power departments can conveniently detect watt-hour meter`s pulse from the outside of the meter
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