ABB REM620-5BMNAAABNHC8BNS11G Motor Management Relay

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1. Product Overview

The ABB REM620-5BMNAAABNHC8BNS11G is a high-performance motor management relay designed for comprehensive protection, monitoring, and management of three-phase motors. The relay integrates protection against overload, locked rotor, phase loss, current imbalance, short circuit, and over/under voltage. It also supports remote monitoring and data acquisition via communication interfaces. The REM620 series is compact and modular, suitable for industrial automation, pumps, fans, and machinery control systems.

2. Main Technical Specifications

• Manufacturer: ABB

• Model: REM620-5BMNAAABNHC8BNS11G

• Product Type: Motor Management Relay

• Rated Operational Current (Ie): Depending on motor connection

• Rated Voltage: AC 24–480 V

• Protection Functions: Overload, locked rotor, phase loss, current imbalance, short circuit, over/under voltage

• I/O Interfaces: Digital and analog inputs/outputs

• Communication Interfaces: Modbus RTU, Profibus, CANopen (system dependent)

• Power Supply: 24 V DC

• Ambient Temperature Range: -20 °C to +60 °C

• Protection Class: IP20

• Mounting: DIN rail or panel mounting

• Response Time: Millisecond-level

• Standards Compliance: IEC 60947-4-1, IEC 60947-5-1

3. Advantages and Features

1. Comprehensive Motor Protection
   Integrated overload, locked rotor, phase loss, current imbalance, short-circuit, and over/under voltage protection.

2. High-Precision Monitoring
   Real-time motor status monitoring and alarm functions ensure safe operation.

3. Remote Communication and Data Acquisition
   Supports Modbus, Profibus, and CANopen for remote control and data logging.

4. Modular Design
   Compact structure for easy installation, replacement, and system upgrade, minimizing downtime.

5. High Reliability
   Industrial-grade design, resistant to high temperature and electromagnetic interference.

4. Typical Applications

• Industrial three-phase motor protection and management

• Pump, fan, and compressor control systems

• Production line and machinery automation

• HVAC systems and water treatment equipment

• Factory energy management and remote monitoring systems

5. Installation and Operation Notes

1. Verify the relay’s rated current and voltage match the connected motor before installation.

2. Follow wiring diagrams carefully to ensure proper connection of I/O and communication interfaces.

3. Install in a dry, ventilated environment; avoid high temperature, dust, and corrosive gases.

4. Perform functional tests before commissioning, including overload, phase loss, locked rotor, and communication testing.

5. Regularly inspect relay status, wiring, and communication connections to ensure long-term reliable operation.

The structure and details of the product：

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