... voltage constant/current constant (could be manually switched)AC inputvoltage rangeAC 220C, 380V, 400V, 415V, 440V(±10%)frequency range50Hz, 60Hzphasesthree phase three ... is very lowProtectionsComplete, Phase loss, input under voltage, overvoltage, output under-voltage, overcurrent, overheat, ... imported products, example: we use digital meter 200RMB aboveHigh quality of rectifierControl DSP digital ...