Technical parameters: 1) Rated voltage: 3 x 220V/380V, 50Hz/60Hz 2) Specifications: 3 x 1.5(6)A, 3 x 5(20)A, 3 x 10(40)A, 3 x 15(60)A, 3 x 20(80)A, 3 x 30(100)A 3) Accuracy: Class1 4) Working temperature range: -25 ~ +55oC 5) Power loss: ≤2.0W/phase 6) Starting current: ≤0.004Ib 7) Day time of error: ≤0.5s/day 8) After the power cut off, the batteries keep ≥10 years 9) Period of time switch error: ≤1min 10) Executive standards: GB/T17215-2002, GB/T15284-2002, and DL/T645-1997 Functions and features: 1) Infrared communication port and RS485 communication port 2) Electricity information adopts LCD display. Also adopts LCD working frequency indication and direction indication 3) Adopts a double crystalline oscillate system and clock inside; all ages calendars calculate automatically 4) Can set up 10 time periods a year and 4 day time periods; every day time period can set up 12 time period on time, peak, level, and off-peak 4 rates 5) Can set up meter reading date closing, holiday and weekend 6) Measures active direction time of period electricity on total, tine, peak, level,off-peak (including the output driven measure pulse); reactive direction total electricity consumption and last month meter reading date closing zero electricity consumption 7) With the function of preventing electric theft, input message by positive direction and reversed direction, total electricity consumption and correspond rate period register simultaneity measure (including output driven measure pulse) 8) Maximum-demand and power measurement 9) Displays max. demand of time period on time, peak, level, and off-peak each rate of the time happening on the month or last month (slide or fixed ways may be set up), and displays the happening time 10) To reset max. demand of electricity can be done automatically or manually,showing the number of reset time and last reset date 11) Displays the total electricity consumption when loss phase (loss 1 phase or 2 phases) 12) Record total time and times of each losing phase 13) Display mode: recurrent display, stepwise display and display parameter, time can be set up 14) LCD auto-recurrent display when power cut off 15) Alarms when meter battery out of working, all parameter storage in EEPROM, it can keep for long time