Drive selection memo for the ACH180-04S-12A6-4
The ABB 3AXD50000956807 is a micro drive module for HVAC duty. It delivers 5.5 kW normal-use output at 12.6 A from a 380–480 V three-phase supply, with a heavy-duty rating of 4.0 kW and 9.4 A. The drive includes the control unit, mounts as a module in frame size R2, and carries IP20 protection.
The normal-use current of 12.6 A (IEC) or 11.0 A (UL) sets the continuous motor load this drive can handle without derating. The heavy-duty curve drops to 9.4 A (IEC) or 7.6 A (UL) — that is the number to use when the load profile includes frequent starts, high breakaway torque, or a variable-torque fan that cycles hard. Light-overload use at 12.0 A (IEC) sits between the two, matching applications where occasional overloads are brief. Power factor sits at 0.98, and standby loss is 12 W — low enough to leave in the loop on a BAS without wasting energy.
Integration notes
The drive communicates via BACnet — no industrial Ethernet onboard (0 hardware interfaces for that), so plan for BACnet MS/TP or BACnet/IP over the built-in serial port. It has 2 analog inputs and 1 analog output for sensor feedback or setpoint control, plus 4 digital inputs and 2 digital outputs for start/stop, fault reset, or status indication. Mounting is module-style in an R2 frame; the enclosure is NEMA Open Type, so it needs a clean, dry panel environment. Ambient temperature max is 60 °C, altitude limit is 2000 m without derating. Sound level is 62 dB(A) — noticeable but typical for a drive of this size in a mechanical room.