... and pre-alarm 5. Event Log: Record Max. 5000 event 6. Support RS485 modbus communication port. 7. Multi-tariff energy (TOU ... . Voltage-Ua, Ub, Uc; 2. Current--Ia, Ib, Ic, In, I unbal, Max. I 3. Active power– Pa, Pb, Pc, ∑P 4. Reactive ... 6. Frequency – F 7. Active energy – kWh 8. Reactive energy -- kvarh 9. Demand and Max. record for I 10. THD for U, I ...