The ABB REM620E-1G belongs to the Relion® 620 series, a dedicated intelligent electronic device for medium & large asynchronous and synchronous motor protection. The full ordering code NBMNAAAAABC6BBN11G defines its fixed hardware configuration, I/O layout, communication interface and HMI variant.
This unit integrates comprehensive protection algorithms: motor differential protection, thermal overload, start-up supervision, phase overcurrent and earth fault protection. It supports RTD temperature monitoring for stator windings and bearings to prevent overheating damage.
Built with withdrawable plug-in architecture, it enables hot removal for maintenance without full cabinet power cut. Native IEC 61850, GOOSE, Modbus and DNP3 protocols support seamless integration into digital substations.
Commonly deployed on compressors, pumps, fans and conveyors within petrochemical, power and mining sites. It remains a critical spare part for plant maintenance and MV motor control cabinet retrofits.
As a flagship motor protection IED from ABB Relion platform, REM620E-1G NBMNAAAAABC6BBN11G combines protection, control, measurement and fault recording in one compact chassis.
Unlike generic feeder relays, the REM620 series is optimized for motor-specific operating characteristics. It distinguishes motor starting inrush current from genuine short-circuit faults to avoid unwanted tripping. The graphical local HMI supports customizable single-line diagrams for intuitive on-site operation.
The defined ordering code locks the hardware configuration, ensuring direct drop-in replacement for identical units during equipment failure. Communication redundancy options strengthen stability for unmanned industrial substations.
Numerous process plants maintain stock of this exact part number to minimise downtime of critical motor loads. It is widely selected for both new MV switchgear projects and legacy protection system modernisation.
Tags: ABB REM620E-1G NBMNAAAAABC6BBN11G, Medium voltage motor protection, Relion IED, substation automation spare
