ABB ACS550-U1-03A3-4 AC Variable Frequency Drive

ABB ACS550-U1-03A3-4 is a compact, 1.5 HP (1.1 kW) three-phase AC variable frequency drive designed to regulate speed and torque of industrial motors powered from 380–500 VAC. This model specifies 380–500 V AC input (±10%), delivering up to 3.3 A of output current and supporting a frequency range of 48–63 Hz to accommodate 50/60 Hz operation. Encased for reliability in typical workshop and plant environments, the drive features an IP54-rated enclosure (NEMA12) and an R1 frame size, with wiring flexibility via bottom or side conduit entries and direct-connect capability. The variant ACS550-U1-03A3-4+B055 indicates this exact configuration within ABB’s ACS550 family. Designed for general-purpose motor control, the ACS550 provides smooth start/stop, reliable speed control, and straightforward integration with control systems, helping to optimize energy use and process performance for machines and conveyors requiring precise speed regulation.