Reliance 1SU21005 Variable Frequency Drive

Reliance SP500 1SU21005 is a 5 HP, 200–230 VAC three‑phase variable frequency drive from the SP500 family (Reliance Electric, now Rockwell/Allen‑Bradley) designed for indoor use in a NEMA 1 enclosure or chassis. It delivers precise speed control for AC motors in applications such as conveyors, pumps, fans, and machine tools, with 50/60 Hz operation and a built‑in local keypad for on‑panel parameter adjustment. The enclosure footprint is about 10.9 in wide × 14.1 in high × 6.2 in deep, enabling mounting in standard control panels where space is a consideration. The model number 1SU21005 denotes a 5 HP SP500 drive rated for 230 V input on three phases, a configuration commonly listed in SP500 catalogs and manuals.