... quality and high accuracy. 3. Good operation functions. Model: YD4E-9S4Function1). Measurement: U, I, P, Q, PF, F, EP all power parameter ... class, Reactive electric energy 2 classDisplayLED / LCD DisplayNetworkThree Phase Three Line, Three Phase Four LineInputmeasurementVoltageRated valueAC 100V,AC 400VOverloadingContinuance:1.2 times ...