Electronic Three-phase Three-wire Multi-user Energ

DSSY520 Electronic Three-phase Three-wire Multi-user Prepaid Energy Meter Descriptions: DSSY520 Electronic Three-phase Three-wire Multi-user prepaid energy meter is a full electronic energy meter with IC card to measure the three-phase AC active power at 50Hz.It can supply electric power only after being repaid by users(more than one user,less than twenty users).When the electric power in the IC 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. Applications: Designed for time-sharing electricity metering of new or reconstructed three-phase user. With prepayment function, it is particularly suitable to solving payment-collecting difficulties in residential area ,irrigation 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-ADE7752. The six analogue-to-digital converters in ADE7752 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 IC card,controls magnetism-keeping relay operating and LCD 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 IC 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 display and Register 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; ·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; ·Indicating broken-phase Main Techical Parameters: Accuary class1.0,2.0Rated voltage3×380VBasic current(Ib)/ Max current(Imax)3×1.5(6)A,3×5(20)A,3×10(40)A,3×20(80)ARated frequency50HzNormal operating temperature-25°C 55°CLimit operating temperature-30°C 60°CStorage temperature-40°C 70°CRelative humidity≤85%Power consumptionVoltage Circuit<2WCurrent Circuit <5VAData storeDate store under no energy 10 yearsSize260mm×164mm×78mmWeightAbout 2KgService life>10 yearsMeter constant800/1600/3200/6400imp/kWhStart current0.004IbNormal operating voltage0.8Un 1.15UnLimit operating voltage0.7Un 1.2UnDegree of protectionIP54Service life of CPU Card100000 timesAccuracy of clock<0.5s/dayCommunication ProtocolDL/T645-1997,DL/T645-2007