... meter 2.high performance 3.ISO9001:2000 Single phase KWH digital meterApplicationDDM100SE single phase two wire electronic DIN-rail active ... office buildings, shopping malls, residences, airports and metro,etc.Function and features:♦35mm standard DIN-rail installation or front board ... of the flow of load current,and alarm.♦Single direction measures single phase two wire active power consumption.It is ...