ABB REX521GBLGSB02G Feeder protection relay

Key features

Wide range of protection and control functionality for incoming and outgoing feeders

Extensive earth-fault protection portfolio with unique multifrequency admittance-based protection for higher sensitivity and selectivity

Several optional functionality packages – advanced and fast fault location of short circuits and earth faults, 

interconnection protection for distributed power generation, capacitor bank, basic motor and arc protection

Supports native IEC 61850 Editions 1 and 2, including redundancy HSR and PRP, 

GOOSE messaging and IEC 61850-9-2 LE for less wiring and supervised communication

Supports Modbus, DNP3 and IEC 60870-5-103 communication protocols and for different time synchronization methods, 

including high-accuracy time synchronization via IEEE 1588 V2 Precision Time Protocol

Compact protection and control for a wide variety of feeder applications

REF620 is a dedicated feeder management relay for protection, control, measurement and supervision in

utility and industrial power distribution systems, including radial, looped and meshed networks, with or without distributed power generation.

Compact and versatile feeder protection relay solution with integration of protection, control, monitoring and supervision in one relay.

REF620 is a member of ABB's Relion® family and part of its 620 protection and control product series.

Scope

Protection for medium voltage substation incoming and outgoing feeders

Key benefits

Extensive protection and control functionality, either with sensors or conventional instrument transformers

Functional scalability and extensive possibilities to easily tailor configurations to application-specific requirements

Withdrawable plug-in unit design for swift installation and testing

Large graphical display for showing customizable SLDs, accessible either locally or through an easy-to-use web-browser-based HMI

Extensive life-cycle services

Ethernet redundancy

IEC 61850 specifies a network redundancy scheme that improves the system availability

for substation communication. It is based on two complementary protocols defined in the

IEC 62439-3:2012 standard: parallel redundancy protocol PRP and high-availability

seamless redundancy HSR protocol. Both protocols rely on the duplication of all

transmitted information via two Ethernet ports for one logical network connection.

Therefore, both are able to overcome the failure of a link or switch with a zero-switchover

time, thus fulfilling the stringent real-time requirements for the substation automation

horizontal communication and time synchronization.