ABB REM620 Motor Protection and Control Relay

Product Description

The ABB REM620 is a motor protection and control relay engineered for medium and large asynchronous and synchronous motors. It delivers comprehensive protection, monitoring, and control functions to ensure reliable motor operation in demanding industrial environments. Moreover, its modular design allows easy integration with ABB’s COMBIFLEX system, providing flexible I/O expansion and efficient system upgrades without extensive rewiring.

The REM620 enhances operational safety by detecting overloads, earth faults, phase imbalances, and abnormal operating conditions. Its large LCD display and local or web-based HMI make monitoring and configuration intuitive. In addition, the relay supports modern industrial communication protocols, enabling seamless integration into automated systems.

Key Features

• Differential motor protection for asynchronous and synchronous motors

• Earth-fault protection, both directional and non-directional

• Backup overcurrent and undervoltage protection for enhanced reliability

• Negative and positive sequence voltage protection for abnormal conditions

• Arc flash detection (AFD) to improve personnel safety

• Up to 14 RTD inputs for precise thermal monitoring

• Modular, drawout design for easy installation and maintenance

• Flexible communication protocols: IEC 61850, DNP3, Modbus®, IEC 60870-5-103

• Redundant Ethernet support: PRP, HSR, and RSTP for high reliability

• User-friendly interface with editable single-line diagrams and programmable push buttons

Technical Specifications

• Model: REM620

• Manufacturer: ABB Group

• Type: Motor Protection and Control Relay

• Series: Relion® 620 series

• Protection Functions: Differential protection, Earth-fault, Overcurrent, Undervoltage, Negative/Positive sequence voltage

• Inputs: Up to 14 RTDs, multiple digital and analog I/O

• Communication Protocols: IEC 61850, DNP3, Modbus®, IEC 60870-5-103

• Redundancy: PRP, HSR, RSTP

• Configuration Options: Single or double bus, one or two circuit breakers

• Display & HMI: LCD with editable single-line diagrams, local HMI, web access

• Installation: Plug-in design for fast commissioning

• Compliance: IEC 61850, IEC 61131-2

Typical Applications

• Manufacturing industries requiring reliable motor control and protection

• Process industries such as chemical, petrochemical, pulp & paper

• Power generation plants needing high-performance motor supervision

• Mining and metallurgical operations with critical motor loads

• Systems integrating multiple medium-voltage motors with centralized control

Support & Reliability

ABB provides comprehensive lifecycle support, including commissioning, preventive maintenance, and firmware upgrades. The REM620 minimizes downtime and extends motor lifetime by ensuring early fault detection and energy-efficient operation. Moreover, ABB’s global service network ensures rapid technical assistance and replacement parts availability.

FAQ

Q: What types of motors can REM620 protect?
A: It supports both asynchronous and synchronous medium-voltage motors.

Q: Can REM620 integrate with existing automation systems?
A: Yes, it supports IEC 61850, DNP3, Modbus®, and IEC 60870-5-103 protocols.

Q: How does the REM620 improve operational safety?
A: It includes differential protection, earth-fault detection, arc flash detection, and phase monitoring.

Q: Can I expand I/O modules for additional monitoring?
A: Yes, the relay allows flexible expansion using ABB RIO600 remote I/O units.

Q: Does it support redundancy for mission-critical systems?
A: Yes, it supports PRP, HSR, and RSTP for high-availability Ethernet networks.