Product Overview

The REM620 is a high-performance motor protection and control relay from ABB’s premier Relion® 620 series. Specifically engineered for medium and large asynchronous and synchronous motors, it provides a "Total Defense" solution for the most critical drive assets in industrial environments. The REM620 excels in detecting complex electrical faults—including overloads, phase imbalances, and negative/positive sequence voltage issues—before they lead to costly motor failure. With its modular, draw-out design and native support for the COMBIFLEX system, this relay offers unparalleled flexibility for system upgrades and I/O expansion, ensuring that your motor control center remains at the cutting edge of operational safety and efficiency.

Technical Specifications

• Model Designation: REM620

• Product Series: Relion® 620

• Motor Compatibility: Medium to Large Asynchronous & Synchronous Motors

• Core Protection Functions: * Differential Motor Protection

• Directional and Non-Directional Earth-Fault Protection

• Backup Overcurrent and Undervoltage Protection

• Arc Flash Detection (AFD) for enhanced personnel safety

• Thermal Monitoring: Support for up to 14 RTD inputs for precision winding/bearing temperature tracking

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

• Network Redundancy: PRP, HSR, and RSTP for zero-packet-loss connectivity

• User Interface: Large LCD with editable single-line diagrams and programmable push buttons

• Installation: Modular plug-in/draw-out design for rapid commissioning and maintenance

• Configuration: Supports single/double bus and one or two circuit breaker layouts

Advanced Safety and Network Resilience

The REM620 is a cornerstone of "Smart Grid" and "Industry 4.0" motor management. By integrating Arc Flash Detection (AFD), the relay can trigger a trip in milliseconds upon sensing the light of an internal arc, significantly reducing the risk of equipment destruction and injury. Its communication architecture is built for the modern era, featuring redundant Ethernet support (PRP/HSR) to ensure that protection signals are never lost, even if a network cable is severed. This makes it an ideal choice for high-reliability sectors like oil and gas, mining, and water treatment, where motor uptime is directly linked to facility throughput.