ABB ACS550-U1-038A-4 AC Drive

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1. Product Overview

The ABB ACS550-U1-038A-4 AC Drive is a universal AC drive from the ABB ACS550 series, designed for controlling three-phase induction motors. It provides precise speed and torque control, built-in protection functions, and energy-saving operation modes. The drive is suitable for pumps, fans, HVAC systems, and industrial machinery. ACS550 drives offer high reliability, easy installation, and low maintenance, meeting the needs of industrial automation and machinery control.

2. Technical Specifications

• Model: ACS550-U1-038A-4

• Product Type: AC Drive / Frequency Converter

• Series: ABB ACS550-U1

• Rated Output Power: 3.7 kW

• Rated Output Current: 9.8 A

• Rated Voltage: 380–480 V AC, 3-phase

• Input Voltage Range: 380–480 V AC

• Input Frequency: 50 / 60 Hz

• Output Frequency Range: 0 – 599 Hz

• Control Methods:

  • V/f Control

  • Sensorless Vector Control

• Overload Capability: 150% rated current for 60 seconds

• Cooling Method: Forced air cooling

• Degree of Protection: IP20 (standard) / optional IP54

• Built-in Functions:

  • PID control

  • Automatic energy-saving mode

  • Multiple start/stop methods

  • Fault protection and alarms

• Communication Interface: Modbus RTU (RS-485)

• Mounting: Wall-mounted or cabinet installation

• Ambient Temperature: –10 ℃ to +50 ℃

• Duty Type: Continuous (S1)

• Certifications: CE, UL

3. Advantages and Features

1. High-Precision Control
   Sensorless vector control enables precise speed and torque regulation.

2. Energy-Saving Mode
   Built-in automatic energy-saving function reduces energy consumption for pumps and fans.

3. Comprehensive Protection
   Overload, short-circuit, overvoltage, undervoltage, and overtemperature protection ensure system safety.

4. Easy Installation and Maintenance
   Modular design, DIN rail or wall mounting, facilitates system integration.

5. High Reliability
   Industrial-grade design ensures stable operation under high temperature, dust, or humidity.

4. Applications

• Pump and pumping station control systems

• Fans and ventilation equipment

• HVAC systems

• Industrial machinery

• Industrial process automation

• OEM equipment and machinery control

5. Installation and Usage Notes

1. Verify that the supply voltage matches the drive’s rated input voltage.

2. Ensure adequate ventilation to prevent overheating and derating.

3. Set motor parameters correctly for precise control and protection.

4. Installation and wiring must be performed by qualified personnel; ensure proper grounding.

5. Regularly inspect air ducts, fans, and cooling system to prevent overheating faults.