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.

Scope

All-in-one protection and control

Benefits

• Complete application coverage with one freely configurable device for

flexible and cost-effective tailoring to application-specific requirements

• Ready-made application packages for convenient and smooth ordering

• Fully modular hardware and software for maximum flexibility and easy 

adaption to changing protection requirements throughout the entire relay life cycle

• Optimal situational awareness and usability with application-driven LHMI/SHMI (switchgear HMI)

• Ready-made application-based LHMI pages – including support for

a 64-channel alarm annunciator (SACO) – saving both time and efforts

• Savings of up to 15% on relay costs with SHMI instead of LHMI

– while still maintaining full LHMI functionality on panel/bay level for optimal visibility

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