... 50KW,380V voltage regulator CE,SGS,ISO9000 Three phase ac voltage regulator 50KW, 380V 3PH voltage stabilizer.CE ... indicators: Input voltage: Three-phase 380V ± 20% single-phase 220V ± 20%.Output Voltage: 380V single-phase 220V.High efficiency: ≥ 98 ... accuracy 1-5% Adjustable.. No overvoltage, undervoltage, phase sequence, with multiple protections.. SBW DBW 50KW three phase ac voltage regulator