The Rotary Converter is designed to supply full running current to a three-phase motor, normally providing it with full running torque. However, most motors will draw five times their running current during start-up. When sized KW for KW the Rotary Converter cannot deliver the full (5 times) starting current to the motor and therefore cannot provide full starting torque. You must always use a larger KW rated Rotary Converter than the KW rating of the motor. Please refer to the “KW” Rotary Converter Application Notes page, or form RTNKW.pdf.