Motor Protection and Control Relay ABB REM620E_1G Relion 620

ABB REM620E_1G Relion 620 Motor Protection Relay

Configured for medium and large-sized motor management in industrial distribution networks, the ABB REM620E_1G (REM620E_1G Motor Protection Relay) provides direct physical and electrical execution of protection logic, motor supervision, and switchgear control.

Hardware Specifications

Industrial Control and Firmware Compatibility

The REM620E_1G integrates comprehensive protection, measurement, and control functions within the Relion 620 series architecture. The module supports firmware flash compatibility, allowing for updates to protection algorithms and communication protocols, such as IEC 61850 Editions 1 and 2, Modbus, and DNP3. Backplane bus communication velocity is managed to ensure deterministic execution of GOOSE messaging and PRP/HSR redundancy protocols. Operators must verify that the configured I/O density scaling aligns with the binary input/output assignments required for the specific motor bay. Time synchronization via IEEE 1588 v2 (PTP) ensures precise timestamping for event logs and disturbance records retrieved via the web-based HMI.

Frequently Asked Questions

Q: Does the withdrawable plug-in design permit hot-swapping under load?

A: While the plug-in design allows for rapid unit replacement, the relay should be isolated from the motor control circuit before withdrawal to prevent unintended trip signals or loss of protection during maintenance.

Q: How does the REM620E_1G ensure communication redundancy?

A: The relay supports Parallel Redundancy Protocol (PRP) and High-availability Seamless Redundancy (HSR) protocols, allowing the unit to maintain communication connectivity even in the event of a single-point failure within the station bus network.

Field Installation Guidelines

1. Mounting: Install the plug-in unit into the compatible switchgear rack. Ensure the rear connector pins engage fully with the cabinet backplane to establish power and signal continuity.
2. Grounding: Bond the module chassis to the switchgear common grounding bus using a low-impedance conductor to provide a stable reference and protect internal components from electromagnetic transients.
3. Connectivity: Connect fiber optic or copper Ethernet links for station bus communication. Observe the minimum bend radius for cables to prevent signal loss in HSR ring topologies.
4. Wiring: Route analog sensing circuits (CT/VT) separately from digital binary I/O wiring to mitigate induced noise. Terminate shields at the designated cabinet ground point to maintain signal integrity for sensitive RTD and mA measurement inputs.