Dem021 three phase electronic watt-hour meter Application type dem021 three phase din rail watt-hour meter is a kind of new style three phase electronic watt-hour meter, the meter completely accord with relevant technical requirements of class 1 and class 2 single phase energy meter stipulated in national standard GB/t17215-2002 and international standard iec61036. It can accurately and directly measure active energy consumption from three phase AC electricity net, it can display total energy consumption by step type impulse register or LCD display. It has following features: Good reliability, small volume, light weight, specious nice appearance, convenient installation, etc. Functions and features 1. May select 35mm din rail installation and installation on the board. 2. May select 5+1 digits register by step type or 7 digits LCD display. 3. May select infrared carrier wave communication and rs485 serial port communication. 4. Impulse output when no power, complying with standard din43864.