dem181 three phase multi-rate ac kilowatt-hour meter is used for measuring power consumption in a rated frequency 50hz three phase three wire or three phase four wire alternating current circuit, which gathers functions of multi-rate (time-of-use) electric energy measuring and max demand electric energy measuring. its technique performance are completely conform to the stipulated requirement of national standard gb/t15283-94 and gb/t 15284-2002 and international standard iec60521. functions and features : 1. infrared remote controller programming setup, message distinguished by code. 2. the message is preserved forever if power is interrupted, inner emplaced spare batteries and are free of maintenance. 3. have four tariffs, six time zones, twelve daily period of times. 4. the direction of electric power can be distinguished automatically. any false pulse wouldn? be input. 5. may choose max demand measuring function. 6. may choose 485 interface and long-distance pulse interface to realize collecting transcription meter. our products watt hour meter, watt hour meters, kilowatt hour meter, kilowatt hour meters, kilowatt-hour meter, kilowatt-hour meters, kwhmeter, kwh meters, electricity meter, electricity meters, electric meter, electric meters, electronic meter, electronic meters, electrical meter, electrical meters, kwhmeters, kwh-meter, electric energy meter, billing meter, static watt hour meter, mechanical kwh meters, watthour power meter, ac kilowatt-hour meter, mechanical kwh meter, mechanical energy meter, single phase mechanical kwh meter, three phase mechanical kwh meter, electro-mechanical kwh meter, prepaid kwh meter, prepayment meter, electricity meters with prepaid chip cards, multi meter, single phase electronic prepayment watt-hour meter, china meter, top-quality electricity meters, din rail kwh meters, din rail watt-hour meter, din rail energy meter, din-rail electronic watt-hour meter, din rail mounted kwh meters, single phase din rail watt-hour meter, single phase din rail kwh meters, three phase din rail kwh meter, three phase electronic kwh electricity meters, single phase electronic kwh electricity meters, din mount single-phase class 1 kilowatt hour meter, din mount three-phase class 1 kilowatt hour meter, din rail mount 1 module single phase kilowatt hour meter