ABB TA25DU-4.0M 2.8-4A Thermal Overload Relay

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1. Product Overview

The ABB ACS550-U1-045A-4 is a medium-power Variable Frequency Drive (VFD) designed for precise control of three-phase AC motors. The ACS550-U1 series offers energy savings, accurate speed/torque control, and protection functions. It is suitable for pumps, fans, conveyors, compressors, and other industrial applications. Compact design and easy installation allow rapid integration into existing automation systems.

2. Technical Specifications

3. Key Advantages & Features

1. Energy Efficient

   • Precise motor speed control reduces energy consumption.

   • Soft start/stop reduces mechanical stress, extending equipment life.

2. Comprehensive Protection

   • Provides overload, over/under voltage, overtemperature, and phase-loss protection.

   • Integrated electronic thermal relay replaces traditional thermal protection.

3. Flexible Control Options

   • Supports V/Hz and optional vector control for diverse industrial applications.

   • Built-in PID functionality for pump and fan closed-loop control.

4. Strong Communication & Integration

   • Supports Modbus, Profibus, CANopen integration with PLC/DCS systems.

   • Optional expansion modules allow remote monitoring and data acquisition.

5. Easy Installation & Commissioning

   • Compact design saves space.

   • Intuitive panel and parameter setting enable fast commissioning.

4. Typical Applications

• Industrial automation motor control

• Pumps, fans, and compressors

• Conveyors and material handling systems

• HVAC and air-conditioning fan control

• Industrial applications requiring precise speed control and energy efficiency

ACS550-U1-045A-4 improves efficiency, reduces energy consumption, and protects motor equipment.

5. Usage Precautions

• Installation: Must be installed by qualified electricians following wiring diagrams.

• Cooling & Ventilation: Ensure proper airflow; avoid high-temperature environments.

• Parameter Settings: Set according to motor rated current, voltage, and load characteristics.

• Protection: Use circuit breakers or fuses externally for safety.

• Maintenance: Check cooling fans, terminals, and communication ports regularly.

• Environment: Avoid high humidity, dust, or corrosive environments to prolong VFD life.

The structure and details of the product：

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