DIN-rail Energy Meter (Single Phase ,4 Module) Type KLS11-DMS-004A single phase DIN rail modular energy meter is a kind of new style single 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 IEC62053-21:2003. It can accurately and directly measure active energy consumption from single phase AC electricity net. It has following features: Good reliability, small volume, light weight, specious nice appearance, convenient installation, etc.