Reliance 1SU41003 AC Variable Frequency Drive

The Reliance 1SU41003 SP500 AC Drive is a 3 horsepower, three-phase variable frequency drive designed as a speed controller for AC electric motors, packaged in a NEMA 1 chassis suitable for indoor industrial environments. As part of the SP500 family, 1SU41003 offers a removable top cover for easy conversion to a chassis style, a local operator station digital keypad, and a terminal strip for remote control operation. Power input options for SP500 drives include single-phase 115 V and 208-230 V, plus three-phase 208-230, 380-460, and 575 VAC; the 1SU41003 variant is configured for 460 VAC operation. This model is documented as a SP500 speed controller for AC motors, specifically used to provide adjustable frequency and voltage to three-phase induction motors in industrial settings.