The ABB 3AUD0000000003 is an HVAC packaged drive bundling the e-clipse bypass and a circuit breaker disconnect inside a NEMA Type3R enclosure — built for outdoor or washdown-adjacent rooftop installs where you don't want a separate bypass cabinet. Rated 125 Hp light-overload (156 A) on UL at 440-480 V three-phase, 50/60 Hz. That 156 A figure is the continuous current the drive can deliver under the light-overload duty cycle typical of fan and pump loads; if your motor nameplate pulls more than that, this unit is undersized.
The 125 Hp / 156 A light-overload rating (UL) is the number that decides whether this drive handles your fan or pump. Light-overload means 110 % current for 60 s every 10 minutes — standard for variable-torque HVAC loads. If your application is constant-torque (conveyor, positive-displacement pump), you need to derate or step up to the next frame. The NEMA Type3R enclosure means it's rain-tight and sleet-resistant; fine for outdoor pad-mount or rooftop, but not submersible (that's Type6P). Input voltage range 440-480 V covers North American 480 V systems; the 50/60 Hz rating means it works on either grid frequency without a configuration change.
Deployment context
This is a packaged drive — the bypass and disconnect are integrated, so you land incoming line power at the disconnect lugs and motor leads at the drive output terminals. No external bypass contactor or separate disconnect switch to panel-build. The NEMA Type3R enclosure has conduit hubs sized for the cable fill; plan your gland plate accordingly. Mounting is floor or wall via the integral flanges; leave clearance for the enclosure door swing and the cooling fan intake.