... for option 2).Optical isolated USB Interface PROVA-6830A Series Power and Harmonics Analyzer (100A;1000A;3000A) Analysis for 3P4W, 3P3W, 1P2W, 1P3W ... True RMS Value (V 123 and L 123 ) Active Power (W, KW, MW, GW) Apparent and Reactive Power (KVA, KVAR) Power Factor (PF), Phase Angle ... from 0.1mA to 3000A, Capable of Analyzing IT Standby Power Consumption to the Maximum Demand of a Factory Display of ...