ABB ACH550-UH-12A-4B055 Variable Frequency Drive

ABB ACH550-UH-12A-4B055 HVAC Variable Frequency Drive is a compact, three‑phase motor speed controller designed for commercial and light‑industrial HVAC systems. It accepts 3‑phase 480 V input and drives a motor up to 7.5 HP with a nominal current rating of 12 A, packaged in a NEMA 12 (IP54 / UL Type 12) enclosure for indoor HVAC installations. The UH variant emphasizes robustness and ease of integration in HVAC environments, offering built‑in BACnet communication and HVAC‑specific software that supports interactive start‑up, a real‑time clock, and harmonic mitigation to improve power quality. This drive is commonly used to regulate supply fans, air handling unit fans, pumps, and compressors, enabling energy‑efficient speed control and smoother building management system (BMS) interfacing. With ABB’s HVAC‑oriented features, the ACH550-UH provides reliable motor control, straightforward commissioning, and diagnostics tailored to HVAC applications, making it a suitable choice when precise fan or pump control is required on a 480 VAC, three‑phase service.