The 3AUD0000000100 is an ABB HVAC packaged drive — a variable-frequency drive, circuit breaker disconnect, and e-clipse bypass all in one NEMA Type3R enclosure. Rated for 75 Hp light-overload duty at 211 A per UL, on a 208-240 V three-phase supply. The 50/60 Hz line frequency is handled natively; no transformer tap change needed for 50 Hz sites.
The 211 A light-overload current (UL) is the continuous rating that governs conductor sizing and upstream breaker coordination — not the motor nameplate alone. The 75 Hp figure assumes a standard 4-pole induction motor at 240 V; derate proportionally if running at 208 V. NEMA Type3R means the enclosure is rainproof and sleet-resistant for outdoor rooftop or pad-mounted installation, but it is not submersible or dust-tight.
Deployment context
The NEMA Type3R enclosure suits outdoor HVAC installations — chillers, cooling towers, rooftop air handlers — where the drive must tolerate rain, snow, and ice without an additional weather shelter. The integrated e-clipse bypass allows the motor to run across-the-line if the VFD section is taken offline for service, keeping the fan or pump moving.