ABB REM601 Motor Protection Relay

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1. Product Overview

The ABB REM601 is a high-performance Motor Protection Relay designed for comprehensive protection and monitoring of medium- and low-voltage motors. It provides protection functions such as overload, phase failure, locked rotor, short circuit, and temperature monitoring, ensuring safe and reliable motor operation. The device also supports digital communication for integration with automation systems and remote monitoring.

2. Main Technical Specifications

• Manufacturer: ABB

• Model: REM601

• Product Type: Motor Protection Relay

• Current Range:

  • 0.1 A – 63 A (adjustable, depending on model)

• Protection Functions:

  • Thermal overload protection (adjustable)

  • Phase failure / phase imbalance protection

  • Locked rotor protection

  • Short-circuit protection

  • Terminal/winding temperature protection (with external PTC/PT100 sensors)

  • Ground fault alarm

• Auxiliary Supply Voltage:

  • 24 V DC / 110–240 V AC/DC (optional)

• Output Contacts:

  • Relay alarm / trip outputs

• Communication Interface:

  • Modbus RTU (RS485)

  • Optional Profibus / DeviceNet / EtherNet/IP (model dependent)

• Ambient Temperature Range:

  • -20 °C to +60 °C

• Mounting:

  • Panel mounting

• Standards:

  • IEC 60947-4-1, IEC 60255

3. Advantages and Features

1. Integrated Multi-Function Protection
   Combines overload, phase failure, locked rotor, short circuit, and temperature protection in one device, reducing the need for additional external protection.

2. Adjustable Settings and Flexible Configuration
   Thermal overload current, delay, and protection levels can be adjusted to match various motor characteristics.

3. Digital Communication and Remote Monitoring
   Built-in Modbus interface allows integration with PLC, DCS, or SCADA systems for remote monitoring and alarm management.

4. High Reliability and Easy Operation
   ABB’s proven protection algorithms and high-quality components ensure reliable operation and user-friendly configuration.

5. Easy Maintenance
   Modular design allows for easy replacement and upgrade, with event logging and fault diagnostics support.

4. Typical Applications

• Industrial motor drive and control systems

• Fans, pumps, and compressors

• HVAC motor protection

• Automated production line motor protection

• Plant and industrial building distribution systems

5. Installation and Operation Notes

1. Ensure the relay model matches the motor rated current and control voltage before installation.

2. Set protection parameters according to motor nameplate data and application conditions.

3. Follow the wiring diagram carefully to avoid incorrect connections and protection failure.

4. Perform functional testing before commissioning to ensure correct operation.

5. Periodically inspect the relay and sensors to ensure long-term reliable operation.

The structure and details of the product：

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