Heavy Duty Rotary Phase Converter AD75 75 HP Wall Unit Digital Controls CNC Phase Converter AD75 - 75 HP Digital Smart Series. Our variable impedance generator (VIT). Plug N Play. For a 75HP load, see sizing table below. CNC: 37.5HP/28kW. TM Series Phase Converters. Single motor start: 37.5HP. byJuly 4, 2026