... electricity grids , automation control system to measure voltage ,current ,active power,reactive power , apparent power, power factor and frequency.They are displayed by ... AC380V,AC100V,DC48V,DC24VVarious shape can be choosed. Accuracy of measurementActive power0.5 degreeReactive power0.5 degreeApparent power0.5 degree ... 96*48 single phase lcd digital display reactive rs485 electric power meter RH-Q5Y