Electric Meter Design service offer single&3 phase RMS value display,C/T settable Up to ... ,8 segments output control DW series Single phase Electric Meter(vol/ampere/power/frequency/power factor) Features: 1) Input: 0-5A/0-600V ... control of power system,factory power distribution,building automation,eg.,single/three phase,voltage/current/power,three phase voltage/ampere integrated ...