ABB ACS550-U1-059A-2 Variable Frequency Drive - IP21-NEMA1
Part Number: 3AUA0000003366
Quick Summary
ABB ACS550-U1-059A-2 is a compact variable frequency drive designed to control 3-phase motors in pumps, fans, and conveyors. Engineers frequently contend with motor startup surges, energy waste, and complex panel wiring, which drive up maintenance costs and project timelines. This drive supports CE conformity and IP21-NEMA1 enclosure protection, aligning with European and North American safety standards for general industrial environments. With adjustable V/Hz and sensorless vector control, plus direct-connect wiring and modular installation, it delivers efficiency, reliable performance, and faster commissioning—helping you lower lifecycle costs. For procurement teams, the combination of ABB engineering support and standardized interfaces translates to predictable lead times and lower total cost of ownership.
Product Information
Extended Description
3AUA0000003366 ABB: ACS550-U1-059A-2
20 HP output on 208-240V ±10% input delivers scalable motor control for mid-size pumps, fans, and conveyors. The business impact is tighter electrical design, lower energy use due to optimized torque, and smoother starts that extend motor life. In practice, engineers can replace multiple starters with a single drive, simplifying procurement, spare parts, and maintenance planning across a production line. IP21-NEMA1 enclosure and bottom/side conduit support simplify installation and enclosure protection in general-purpose panels. This reduces wiring complexity and panel height requirements, speeding up commissioning and reducing field labor. In applications, retrofit projects and new equipment in manufacturing floors benefit from quicker safety-compliant installations without specialized enclosures. Wide frequency range of 48-63 Hz accommodates regional power quality and variable-speed applications, helping maintain motor performance without overdimensioning. The business outcome is improved uptime and reduced motor wear, especially on fans and pumps with fluctuating loads. Typical uses include process lines, HVAC, and material handling where precise speed control matters. Sensorless vector control option delivers improved low-speed torque and smoother starts without external feedback hardware. This translates to better performance on belts, spindles, and conveyors under varying loads, while conserving space and cost. When full vector feedback is impractical, SVC provides near-closed-loop behavior for critical operations. Direct Connect wiring and bottom/side conduit enable faster wiring, fewer junctions, and cleaner panel layouts. Combined with ABB's standard interfaces, this reduces commissioning time and simplifies upgrades or retrofits. End users in automation plants gain predictable integration with existing PLCs, field devices, and motor starters, shortening project cycles and lowering total cost. Energy-saving features such as soft-start, ramp control, and efficient motor algorithms lower peak demand and operating costs over the product life cycle. This aligns with sustainability targets and regulatory requirements while maintaining process control accuracy. For maintenance teams, built-in diagnostics and protection functions help preempt faults, supporting higher overall equipment effectiveness.
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FAQs
The ACS550-U1-059A-2 supports 208-240V input with a 20 HP (approximately 14.9 kW) output rating and a current draw around 59.4 A. This makes it suitable for standard mid-size three-phase motors in pumps, fans, and conveyors, enabling efficient speed control without oversizing drives.
Installers can use direct-connect wiring and bottom or side conduit to simplify panel layouts, reduce wiring complexity, and speed commissioning. Ensure enclosure protection remains IP21-NEMA1 compliant and follow the included ABB wiring diagrams for safe connections to power, motors, and control signals.
Sensorless vector control is available on the ACS550-U1-059A-2 and is beneficial when you need improved low-speed torque and smoother starts without extra position sensors. Use SVC for conveyors, fans, or pumps that require reliable start-up performance under varying loads.
Best-suited for mid-size pumps, fans, and conveyors in process industries, packaging lines, and HVAC systems. The 48-63 Hz range supports variable loads and inconsistent power quality, while the IP21 enclosure offers general-purpose protection suitable for controlled plant environments.
Expect reduced maintenance through built-in diagnostics, motor protection, and soft-start features that lower mechanical wear. ROI is driven by energy savings from efficient motor control, shorter commissioning times due to plug-and-play wiring, and lower total cost of ownership from fewer spare parts and simplified panel layouts.