Power and Harmonics Analyzer PROVA-6830A Series 1).Clamp Meter:100A,1000A,3000A for ... ).Optical isolated USB Interface PROVA-6830A Series Power and Harmonics Analyzer (100A;1000A;3000A) Analysis for 3P4W, 3P3W, 1P2W, 1P3W True ... (PF), Phase Angle (Φ) Energy (WH, KWH, KVARH, PFH) Current Measurement from 0.1mA to 3000A, Capable of Analyzing IT Standby Power ...