ABB ACS550-01-031A-4 AC Variable Frequency Drive

The ABB ACS550-01-031A-4 is a 380–480 V AC three-phase variable frequency drive (VFD) that enables precise motor speed control in industrial equipment. It delivers 31 A of output current and approximately 18.5 kW (25 HP nominal at 460 V), with a programmable 0–500 Hz range and support for scalar (V/Hz) and vector control; the unit is housed in an IP21 / UL Type 1 enclosure and includes a built-in EMC filter and braking chopper, with a 0 °C to +40 °C operating range (derating applies). It is a wall-mounted drive module commonly used on conveyors, pumps, HVAC systems, and general automation machinery, including water and wastewater facilities, material handling, air handling units, packaging equipment, and process control applications, and is suitable for retrofits, replacement of failed VFDs, control panel upgrades, and new installations.