ABB ACH550-CARUH-031A-4H358 HVAC Variable Frequency Drive

ABB ACH550-CARUH-031A-4H358 HVAC Variable Frequency Drive is a 380–480V, three‑phase ABB drive delivered as a takeout unit for HVAC applications. This ACH550 model belongs to ABB's ACH550 HVAC drive family and is designed to regulate motor speed for fans and pumps in commercial and industrial climate control systems, enabling energy‑efficient operation by matching motor speed to load. The unit is rated for 31A continuous current at 380–480V three‑phase supply, making it suitable for mid‑sized HVAC fans and pumps. The designation CARUH-031A-4H358 identifies a specific variant within the ACH550 line, intended for field replacement in existing installations. In line with ACH550 HVAC drives, it supports application macros tailored to typical HVAC tasks, including Supply Fan, Return Fan, Cooling Tower Fan, Condenser, and Booster Pump control, to simplify commissioning in air handling units, rooftop units, and packaged systems. By regulating motor speed rather than running at fixed full speed, the ACH550-CARUH-031A-4H358 offers precise control, smoother start-up, and potential energy savings for variable HVAC loads. This takeout drive can integrate with standard HVAC control schemes and ducted fan and pump configurations, helping to improve system efficiency without requiring major rewiring or equipment upscaling.