Drive selection memo — 3AUD0000003155
The ABB 3AUD0000003155 is an ACH580 HVAC enclosed ultra-low harmonic drive rated for 302 A light-overload output (250 Hp UL) on a 440–480 V three-phase supply. Frame size R11, IP21 with a NEMA Type 1 enclosure. It ships with a non-fused disconnect built in — one less component to panel-mount and wire for the line section.
The 302 A light-overload current (250 Hp) is the continuous rating that governs motor sizing for variable-torque HVAC loads — fans, pumps, compressors. Light-overload (110% for 60 s) is the standard duty cycle for these applications; heavy-overload would be a different frame. The 440–480 V input range covers 460 V nominal North American supplies; the drive accepts 50 or 60 Hz line frequency. IP21 and NEMA Type 1 mean it is suited for indoor installation where dripping water or incidental contact is the concern — not washdown, not outdoor.
