ABB REM620_F Relion 620 Motor Management Relay

The ABB REM620_F, also cataloged as the REM620 Motor Management Relay, operates as a dedicated hardware component for comprehensive protection, control, and supervision within medium- to large-sized asynchronous and synchronous motor networks.

Hardware Specifications

Backplane Bus Communication Velocity and Firmware Compatibility

• The relay routes high-speed GOOSE messaging and sampled values across Profinet / EtherNet/IP deterministic networks, supporting dual-port HSR and PRP redundancy for zero-loss network fault recovery. Sub-microsecond event stamping is maintained across all process channels via IEEE 1588 V2 PTP time synchronization.
• Integrated firmware flash compatibility across the Relion 620 platform supports dynamic I/O density scaling through multi-channel RTD and mA analog input processing. Real-time thermal tracking for motor windings and bearings executes deterministically without inducing bus update latencies.

Frequently Asked Questions

Q: How does the withdrawable chassis architecture handle CT circuit safety during relay removal?

A: The withdrawable plug-in unit incorporates integrated automatic CT shorting blocks that bridge current transformer secondary circuits before the module fully disengages from the case.

Q: What substation network redundancy protocols are natively supported on the dual Ethernet ports?

A: The relay supports High-availability Seamless Redundancy (HSR) and Parallel Redundancy Protocol (PRP) for zero-switchover-time network redundancy.

Field Installation Guidelines

• Verify that all current transformer (CT) secondary leads are shorted using external test switches before performing physical panel insertion or removal of the relay unit.
• Secure the outer mounting frame into the motor control center panel cutout using factory brackets to establish firm mechanical bonding and earth grounding.
• Connect multi-channel RTD and analog temperature sensor wiring using shielded cable runs, grounding shields at a single panel earthing point to mitigate signal noise.
• Route dual optical or RJ-45 Ethernet cables separately through wire ducts to maintain physical separation between redundant HSR/PRP communication paths.