The ABB 3AUD0000000721 is an HVAC enclosed ultra-low harmonic drive with an integrated circuit breaker, part of the ACH580 series. It delivers 60 Hp (77 A) under light-overload use at 460 V, three-phase, on a 440...480 V input range (50/60 Hz). The R6 frame keeps the package manageable for panel integration, and the NEMA Type 1 (IP21) enclosure suits indoor installations where drips and falling dirt are the main concern — no washdown rating here.
The 77 A light-overload current at 460 V (60 Hp) is the figure that governs motor sizing — it tells you the drive can deliver full rated torque continuously for a 60 Hp motor without exceeding thermal limits. The 440...480 V input range covers standard North American 460 V and 480 V grids, and the 50/60 Hz tolerance means the same unit works on 50 Hz export installations. The R6 frame size determines the mounting footprint and the gland-plate clearance for incoming power and motor cables; verify the panel cutout against the ACH580 R6 dimensional drawing before laying out the enclosure.