The ABB 3AXD50000956821 is an ACH180-series LV AC micro drive module built for HVAC applications. It delivers 11 kW (25.0 A) in normal use from a 380-480 V three-phase supply, with a heavy-duty rating of 7.5 kW (17.0 A) and a light-overload rating of 11 kW (23.8 A). The UL listing shows 15 Hp (21.0 A) normal use, 10 Hp (14.0 A) heavy-duty, and 15 Hp (21.0 A) light-overload at 460 V. Apparent power output is 17 kV·A, power factor 0.98.
The heavy-duty rating (17.0 A) applies when the drive must handle higher starting torque or cyclic overloads — for example, a compressor or a conveyor. The light-overload rating (23.8 A) sits between the two and covers applications with moderate overload profiles. The UL current ratings are slightly lower (21.0 A normal, 14.0 A heavy-duty) because UL derates for 460 V operation. The drive is IE2 efficiency class and operates from 47.5 to 63 Hz, covering both 50 Hz and 60 Hz mains.
The drive includes 2 analog inputs, 1 analog output, 4 digital inputs, and 2 digital outputs. Communication is via BACnet — there are no industrial Ethernet interfaces on this variant. The R3 frame size and IP20 enclosure suit panel mounting in a clean environment. Maximum ambient temperature is 60 °C, altitude rating 2000 m. Standby loss is 26 W, sound level 66 dB(A).