Runs three-phase equipment on 63 existing 220V single-phase power For long heavy starting loads, instant reversing, momentarily overloaded motors, or imported equipment; please inquire. Voltage stabilizer available for high line voltage and voltage-sensitive equipment such as CNC's; please inquire. Runs motor loads only at 2/3 rated HP How to Size: The largest motor on your machine must fall within the minimum and maximum range of the converter. Do not order a larger unit or heavy duty model thinking it will give you more horsepower. When To Use Heavy Duty: Heavy starting loads (lathes, flywheel driven equip., etc.). Instant reversing, frequent starting, jogging. Air compressors (motor pulley must be reduced by 1/3 diameter). Heavily Loaded Equipment: Pumps, fans, blowers, direct-drive compressors, or equipment requiring greater than 2/3 of its rated HP, use a Phase-A-Matic rotary converter.