Three-phase electronic energy meter combination of Active and Reactive Power using the latest micro-electronics technology for measuring rated frequency 50/60Hz three-phase AC active and reactive power. Function: Mesure and disply AC reactive and active energy. Mesure and display the positive and opposite current. The meter can prevent tamper events. It can also prevent the influence from D.C. and external high magnetic field. Applicable conditions: Ambient temperature of -25 ℃ - +65 ℃, relative humidity should not exceed 85% Technology Parameters: Rated voltage:3*220V Rated frequency:50/60Hz Caliberation current: 3*1.5(6)A