
ABB ACS550-U1-078A-4 | 3AUA0000009443
ABB ACS550-U1-078A-4 | 50 HP Variable Frequency Drive, IP21 Global Commercial Alias: ACS550-U1-078A-4Product ID: 3AUA0000009443ABB Type Designation: ACS550-U1-078A-4Catalog Description: General purpose AC drive, 50 HP, 78 A, 3-phase, 380–480 V, IP21, wall-mounted Overview The ABB ACS550-U1-078A-4 is a robust 50 HP variable frequency drive built for industrial and commercial motor control needs. With a 3-phase input voltage of 380–480 V and 78 A output current, it offers reliable and energy-efficient performance in a compact IP21 wall-mountable enclosure. Key Features Motor Power: 37 kW (50 HP) Input Voltage: 380–480 V AC, 3-phase Output Current: 78 A Output Frequency: 0 to 500 Hz Control Methods: Scalar (V/f), Sensorless Vector Overload Capacity: Heavy Duty: 150% for 60 sec Normal Duty: 110% for 60 sec Built-in EMC Filter: Category C2 Safety Function: Safe Torque Off (STO) Communication: Modbus RTU (RS-485) User Interface: Integrated keypad with navigation ass