Drive selection memo — HVAC ultra-low harmonic
The ABB 3AUD0000000719 is an HVAC-dedicated enclosed ultra-low harmonic drive with an integrated circuit breaker, rated for 40 Hp light-overload use at 52 A output on a 460 V 3-phase supply. The R6 frame size and NEMA Type 1 enclosure with IP21 protection suit it for indoor mechanical-room or rooftop installation where harmonic mitigation is specified without an external filter. The 440–480 V input range covers common North American 460 V and 480 V distribution, and the 50/60 Hz rating means the drive accepts either line frequency without reconfiguration — useful for sites with mixed-frequency genset backup or dual-rated equipment.
For a BOM line that specifies the 3AUD0000000719, the active status means you can commit the part number without obsolescence risk in the near term.
The 40 Hp light-overload rating (52 A) is the UL-listed output for variable-torque HVAC loads such as fans and centrifugal pumps. Light-overload duty means the drive delivers 40 Hp continuously without derating — the standard selection point for fan/pump curves where peak demand rarely exceeds 110 % of nameplate. NEMA Type 1 (IP21) enclosure is the minimum for indoor, non-washdown locations. If the drive sits in a conditioned mechanical room or penthouse, this is adequate; for outdoor or washdown areas, a higher-rated enclosure variant would be needed. The integrated circuit breaker simplifies panel layout by combining disconnect and short-circuit protection in one package — one less component to size and wire.