... unit and optional modules4. 10 years back-up of integrated energy data5. Large LCD, high brightness, auto-scrolling6. High accuracy, V ... , ∑Q5. Power factor—PFa, PFb, PFc, ∑PF6. Frequency7. Active energy—kWh8. Reactive energy– kvarh Connection3 Phase 3 Wires, 3 Phase 4 WiresRated ... 0.1HzPower Active / Reactive / Apparent power, accuracy 0.5%F.S.Energy Accuracy for Active Power and Reactive Power : 1%F ...