ABB REM620_F Relion 620 Motor Protection Relay

Configured for comprehensive protection, control, and supervision in medium- to large-sized asynchronous and synchronous motor networks, the ABB REM620_F (REM620 Motor Management Relay) provides direct physical/electrical execution.

Hardware Specifications

Backplane Bus Communication & Deterministic Networks

The ABB REM620_F executes high-speed signal distribution across internal backplane bus channels and station Ethernet networks. Utilizing IEC 61850 Edition 2 and process bus protocol (IEC 61850-9-2 LE) standards, the unit transmits peer-to-peer GOOSE communications and sampled analog values across deterministic substation architectures. Dual-port HSR and PRP hardware redundancy ensures continuous backplane and bus communication availability without packet loss during physical network outages. Internal firmware flash compatibility supports custom multi-layer logic schemes, driving real-time trip circuit decisions without introducing backplane communication latencies.

Frequently Asked Questions

Q: How does the withdrawable chassis design prevent open circuits on CT secondary lines during module removal?

A: The withdrawable plug-in chassis features integrated automatic shorting blocks that engage before the primary connector disconnects, ensuring current transformer secondary circuits remain safely closed during maintenance.

Q: What network redundancy protocols are natively supported for IEC 61850 station bus connectivity?

A: The module supports dual-port High-availability Seamless Redundancy (HSR) and Parallel Redundancy Protocol (PRP), providing zero-switchover-time network redundancy for critical GOOSE messaging and process bus communication.

Q: How does time synchronization function across connected substation networks on the REM620_F?

A: The relay supports IEEE 1588 V2 Precision Time Protocol (PTP), SNTP, and IRIG-B inputs, locking event logging and disturbance record timestamps to sub-microsecond clock precision.

Field Installation Guidelines

Mount the outer casing securely into the switchgear panel cutout, bonding the chassis ground terminal directly to the switchgear earth bus using a short, low-impedance copper strap. Route all current transformer (CT) and voltage transformer (VT) secondary wiring through dedicated test switches or terminal blocks before connecting to the rear terminal assembly. Ensure fiber optic or RJ45 Ethernet communication cables adhere strictly to minimum bend radius specifications and maintain physical isolation from high-voltage AC current lines. Verify that all automatic CT shorting mechanisms function properly prior to drawing out or inserting the active relay unit during commissioning.