ABB ACH550-PD-031A-4 AC Drive With Disconnect Switch

ABB ACH550-PD-031A-4 is a three-phase AC drive designed for 380–480 V networks, packaged with an integrated disconnect switch for safer commissioning and servicing of powered motors. This 20 HP (approximately 15 kW) drive delivers up to 31 A continuous current, making it suited for medium-sized HVAC fans, pumps, and other building-services equipment that require precise speed control. The -031A-4 designation identifies the model’s current rating and configuration within the ACH550 family; the device is designed to operate directly from 480 VAC three-phase supply and provide adjustable-speed control for motors. Typical installations include rooftop fan assemblies, air handling units, water pumps, and circulating pumps in commercial buildings, hospitals, and data centers where energy efficiency and motor control are important. The packaged construction consolidates the drive electronics and a mechanical disconnect into a single enclosure, minimizing wiring complexity and simplifying compliance with safety standards during installation and maintenance.