
ABB - Low Voltage Drives
ACS550-U1-157A-4
Alternate Item Number: 3AUA0000002791
UPC: 662348050392
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Overview
The ABB ACS550-U1-157A-4 AC Drive (SKU: ACS550-U1-157A-4) provides 125 horsepower and 157 amps of output for 3-phase motors operating within a 380-480V input range. This advanced drive is designed for reliable industrial performance with a 1.1 overload capacity, suitable for demanding applications. Its Type 1 / IP21 enclosure offers protection against dust and light water splashing, making it ideal for wall-mounting installations. The compact dimensions of 35 x 11.9 x 15.8 inches ensure efficient integration into standard industrial cabinets. The ACS550 series is engineered for applications in manufacturing, HVAC systems, and material handling, delivering precise motor control. It features advanced functionalities such as built-in PID control for process automation and Modbus RTU communication for system integration. The drive supports both sensorless vector and V/f control modes, optimizing energy efficiency across variable load conditions. ABB's established reliability minimizes downtime and reduces maintenance expenses in continuous-duty industrial environments.
- 125HP / 157A Output for 3-Phase Motors
- 380-480V Input Voltage Range
- Type 1 / IP21 Enclosure for Protection
- Wall-Mount Design for Space Efficiency
- Advanced Motor Control with PID and Modbus RTU
Specifications
Control Panel | Advanced |
Current Rating | 157A |
Frame Size | R6 |
Input Phase | 3-Phase |
IP Rating | IP21 |
Mounting Type | Wall Mount |
Mounting Type | Wall |
NEMA Rating | Type 1 |
Output Current | 157 |
Output Phase | 3-Phase |
Series | ACS550 |
Size | 35 in x 11.9 in x 15.8 in |
Size | 35 x 11.9 x 15.8 in |
UL Type | 1 |
Voltage | 480 |
Voltage Range | 380-480 |
Voltage Rating | 380-480 V |
Voltage Rating | 3-380-480V |
Package Dimensions (L x W x H) | 15.8 in x 11.9 in x 35 in |
Package Dimensions (L x W x H) | 40.132 cm x 30.226 cm x 88.9 cm |
Package Weight (Imperial) | 152.000 L |
Package Weight (Metric) | 68.947 kg |

FENA-21
The FENA 21 DualPort module supports Three protocols Modbus-TCP, EtherNet/IP, and the PROFInet IO RT network. The Modbus-TCP protocol is simply the Modbus protocol used on top of Ethernet-TCP/IP. Modbus-TCP is an open Industrial Ethernet network which has been specified by the Modbus-IDA User Organization. EtherNet/IP is based on the Common Industrial Protocol (CIP), which is also the framework for both the ControlNet and DeviceNet network protocols. PROFInet IO RT is an open network based on the PI Organization standard.














