ABB REM620_F Synchronous Motor Relay

Product Description

The REM620_F is a dedicated, heavy-duty Motor Management and Protection Relay engineered by ABB as an elite member of the Relion 620 product series. Specifically designed for large-scale asynchronous and synchronous motor installations across the manufacturing and process industries, this robust IED provides comprehensive protection, control, measurement, and supervision capabilities. 

Technical Specifications

• Manufacturer: ABB

• Product Series Family: Relion 620 Product Architecture

• Model Number Designation: REM620_F (Also referenced as REM620)

• Device Classification: Medium- to Large-Sized Asynchronous & Synchronous Motor Management IED

• Core Protection Array: Motor differential protection, thermal overload tracking, locked rotor protection, frequent stalling monitors, phase-reversal/unbalance safety, and undercurrent/loss-of-load detection

• Thermal Monitoring Matrix: Direct support for multi-channel RTD and mA analog inputs for real-time stator, winding, and bearing temperature tracking

• Substation Network Redundancy: Dual-port High-availability Seamless Redundancy (HSR) and Parallel Redundancy Protocol (PRP)

• Communication Protocol Profiles: Native IEC 61850 (Ed. 1 & 2 with GOOSE messaging), IEC 61850-9-2 LE (Sampled Values), Modbus, DNP3, and IEC 60870-5-103

• Time Synchronization Interface: IEEE 1588 V2 Precision Time Protocol (PTP) for sub-microsecond event stamping

• Hardware Form Factor: Compact withdrawable plug-in chassis configuration with integrated shorting blocks

• Human Machine Interface (HMI): Large built-in local graphical display window showing customizable Single Line Diagrams (SLD), with alternative web-browser HMI connectivity

• Safety Options Upgrade: Optional high-speed arc flash optical sensors and ultra-fast output contacts

Industrial Application Scenarios

The REM620_F motor management relay is widely deployed within petrochemical refineries, heavy mining installations, thermal power generation plants, water pumping complexes, and pulp and paper mills. In these demanding processing spaces, large medium-voltage motors drive critical machinery like multi-stage gas compressors, high-pressure boiler feed pumps, main ventilation fans, and massive rock crushers. A sudden electrical short or thermal failure on these main motors can cause millions of dollars in mechanical destruction and facility downtime. The REM620_F is installed in the motor control center (MCC) to act as an advanced safeguard. It constantly tracks phase balance and checks for inner-stator insulation breakdown via motor differential current monitoring. If a winding breakdown or an unexpected mechanical lockup occurs, the relay cuts power to the motor in milliseconds, preserving the machine's copper stator iron from melting.