Industrial Energy Meter single&3 phase RMS measurement for volt,amp,power.frequency,power factor,reactive power,etc. 2011--Industrial Energy ... DC(24V DC)Measure ParametersRMS measurement, 1/3 phase volt,amp,power,power factor,frequency,KWH,reactive powerAppearance48H*96W*100Lmm, 12 ... 96W*100Lmm, 3 line 4 digits displayDirect InputVolt: 0-600V Amp: 0-5A, 0-10APT/CT ratio Set freelyFrequency0-2. ...