ABB REM610 Motor Protection Relay

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1. Product Overview

The ABB REM610 is a dedicated motor protection relay designed for low- and medium-voltage motors, including induction and synchronous motors. It integrates comprehensive protection, monitoring, and control functions required during motor operation. The relay effectively protects motors against overload, stall, phase loss, unbalance, and earth faults, improving system safety and operational reliability. REM610 belongs to the ABB 600 series and features a compact and proven industrial design.

2. Main Technical Parameters (Typical)

Current Inputs

• Rated current: 1 A / 5 A via current transformers

• Measurement: Three-phase currents

• Measurement principle: True RMS measurement for protection and monitoring

Voltage Inputs (Optional)

• Three-phase or phase-to-phase voltage inputs

• Used for voltage, power measurement, and selected protection functions

Protection Functions

• Thermal overload protection (I²t characteristic)

• Excessive starting time protection

• Stall (locked rotor) protection

• Underload / no-load protection

• Phase unbalance and phase loss protection

• Earth fault protection

• Overcurrent protection (definite-time / inverse-time)

Measurement and Monitoring

• Three-phase current measurement

• Active power, reactive power, and power factor (depending on configuration)

• Motor operating status and start counter monitoring

Control and Signaling

• Trip control for circuit breakers or contactors

• Programmable digital inputs and outputs

• Event and fault recording

Communication

• ABB SPA communication protocol

• Optional IEC 60870-5-103 or other protocols depending on version

Auxiliary Power Supply

• Wide-range AC/DC auxiliary supply (e.g. 24–250 V AC/DC, model dependent)

Mounting

• Flush-mounted panel installation

• Compact design suitable for motor control centers

3. Advantages and Features

• Motor-specific protection optimized for motor thermal and electrical behavior

• Integrated solution combining protection, measurement, control, and communication

• High reliability with industrial-grade hardware design

• Flexible parameter setting adaptable to different motor ratings and applications

• Easy maintenance through clear fault and event records

• Proven ABB quality with long-term field application experience

4. Typical Applications

• Motor protection in industrial production lines

• Pumps and compressors in oil and chemical industries

• Motors in metallurgy, cement, and mining plants

• Water supply and wastewater treatment systems

• Power plants and auxiliary motor systems

• Public utilities and general industrial automation

5. Application Notes

• Select the relay according to motor rated current, voltage, and starting method

• Ensure proper selection of current transformer ratios and accuracy classes

• Set thermal overload parameters based on the motor thermal characteristics

• Adjust starting and stall protection settings according to actual load conditions

• Verify communication compatibility with the supervisory control system

• Perform functional testing before commissioning to ensure correct operation

The structure and details of the product：

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