The ABB 3AUD0000000736 is an HVAC enclosed ultra-low harmonic drive built for 3-phase 440-480 V input at 50/60 Hz. It delivers 20 Hp light-overload output at 27 A (UL rating).
The 20 Hp / 27 A light-overload rating at 460 V (UL) is the continuous-duty limit for variable-torque loads like fans and centrifugal pumps. If your motor nameplate exceeds 27 A at the drive output, step up to the next frame size. Light-overload means 110 % current for 60 s — enough for fan inertia starts, not for high-breakaway torque conveyors. Input voltage range 440-480 V covers common North American 460 V and 480 V grids. The 50/60 Hz rating means the drive handles both line frequencies without a hardware change — useful for multi-site specs.