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 Overview:DTSYF171-A/DSSYF171 three phase multi-tariff prepayment meter is a meter integrated with prepayment function unit and multi-tariff function unit. The meter adopts SOC circuit which integrates MCU and energy measurement chip. Meter data and parameters can be read and transferred remotely by RS485 network. It is very practical for commercial application. Main function: *Measure positive and negative active energy for 4 different tariffs.*Max 4 tariffs, 12 tariff periods. * Read and program meter via optical port by TTU*Display parameters of max 14 items, the order and time interval of display is programmable.*Record last 12 months' total active energy and active energy in each tariff period.*Purchase before use *Automatically store data of energy consumption at preset day.*Program parameters via IC card*Large-capacity reading meter data (max 169 meters' consumption data can be read by one special card) *Cut off power supply when overload*Set emergency credit and friendly period for customer convenience*Internal audible & visible alarm, switch-off relay (external alarm output is optional)*Instantaneous load measurement*Malfunction self-detection (include load switch, EEPROM, IC card data)*Large-screen LCD display Technical data: Standard: comply with GB/T17215-2002, GB/T18460-2001, GB/T15284-2002,IEC 62053-21,DL/T645-1997.Accuracy: class 1.0, 2.0 Reference voltage:3*57.7/100V,3*220/380V,3*100V,3*380VReference frequency: 50Hz, 60HzCurrent:3*1.5(6)A,3*5(20)A,3*10(40)A,3*15(60)A,3*20(80)AOperate voltage range: 0.8Un~1.15UnOperate temperature range: -25~+55Circuit power consumption: voltage circuit power consumption<=3W/12VA, current circuitPower consumption <=4VA