... voltage and current, frequency, phase sequence, active power, reactive power, apparent power, power factor, current vector sum, distinguish transformer wiring group ... .1mAPhase:0.1°Frequency:0.01HzActive Power:0.1WReactive Power:0.1VARApparent Power:0.1VAPower Factor:0.001Current Vector ... 1000V/50Hz sine wave AC voltage for 1 minute between the meter lines and shell; Withstand 500V/50Hz ...