All-in-one protection for advanced power generation and distribution applications

REX640 is a powerful all-in-one protection and control relay for advanced

power generation and distribution applications.

REX640 offers unmatched flexibility throughout its entire life cycle 

– from ordering through testing and commissioning, 

to upgrading the functionality of its modular software and hardware to meet new application

requirements.

As a member of ABB’s Relion® protection and control family of relays,

REX640 further reinforces Relion’s position as the range of relays to rely on.

Features

• IEC 61850 Edition 2.1 – certified by DNV/GL (KEMA)

– and Edition 1 and with redundancy support based on HSR and PRP

• Ability to receive four streams of sampled measured values (SMVs) 

and send one via IEC 61850-9-2 LE-based process bus communication

• DNV type approval certificate for installations onboard ships and offshore units

• Support for high-speed bus transfer in case of a failing incoming feeder

to secure electrical supply for critical parts of a system

• Synchronizer functionality for both generator and non-generator breakers

Four supervised arc sensor inputs, either loop or lens-type