... power measurement, electric energy calculation, data display, data acquisition and data transmission. They are widely used transform substation automation, Distribution ... %Frequency40~60Hz, accuracy 0.2HzFunctionActive power, Reactive power, Apparent power, Accuracy: 0.5% classElectric ... active poweraccuracy rate0.5 class%, reactive power accuracy rate0.5% classDisplayProgrammable, switching, circular ...