... 35mm DIN rail installing, standard DIN ED50028. High temperature resistant materials9. Spring type buckle, easy to installBasic Function 1. Measure and display ... RS485: V, I, P, Q, S, PF, FOptional Function 1. Multi-tariff2. Reactive energy measuring3. Demand analysis ParameterAccuracyVoltage0.2%Current0.2 ... Power factor0.5%Frequency0.01Active energy0.5%Reactive energy2.0% Three phase electronic meter