All-in-one protection relay for advanced applications

ABB REX640 400

Mar 11, 2019

The fully modular, adaptable all-in-one protection and control relay REX640 makes protecting all your assets in advanced power generation and distribution applications easy throughout the relay’s life cycle.

ABB has added a new member to its prominent Relion protection and control family of relays for digital switchgear. REX640 is the outcome of a long-standing evolution and builds on ABB’s strong heritage of freely configurable multifunctional relays.

REX640 covers the full range of utility and industrial applications and is able to manage multiple applications simultaneously. This guarantees flexible, versatile and cost-efficient protection solutions. In brief, REX640 resets the standards of what is possible with a protection and control device.

The modularity and scalability of both software and hardware not only allow full customization freedom but now also unequalled flexibility in modification over the lifetime of the relay. REX640 is ready to adapt to changing protection requirements, anytime. New software and hardware developments will be continuously and easily accessible. This is asset management at its best.

“REX640 is the outcome of an evolution that will revolutionize the world of distribution protection and control,” said Alessandro Palin, managing director of ABB’s Distribution Solutions business. “It fulfills the efforts of many to introduce a new solution for our customers’ needs.”

REX640 has been designed to support the increasing digitalization of substations and thereby a variety of digital switchgear solutions. With a record number of local measurement channels, supporting both conventional instrument transformers and sensors, REX640 is also able to receive multiple streams of sampled measured values via IEC 61850-9-2 LE-based process bus communication.

In addition, REX640 introduces a novel, application-driven approach to the local human-machine interface (LHMI), which allows support for entirely new applications. The intuitive LHMI features a color touch screen that visualizes power distribution process information in a unique way, with increased situational awareness and maximum usability as a result.

REX640 will be released for sale during quarter four, 2018. As a member of ABB’s Relion® protection and control family of relays, REX640 further reinforces Relion’s decade-long position as the range of relays to rely on. REX640 will be showcased at Hannover Messe 2018 at the ABB booth in Hall 11, Stand A35, installed in the UniGear Digital and ZX2 switchgear.

Go HERE for more information

Related Articles


Latest Articles


Changing Scene

  • Save the Date: Ontario Apprenticeship Summit 2026 – November 4, 2026

    Save the Date: Ontario Apprenticeship Summit 2026 – November 4, 2026

    July 6, 2026 Skilled Trades Ontario (STO) is pleased to announce that the third annual Ontario Apprenticeship Summit will take place during National Skilled Trades and Technology Week. Industry partners, skilled trades professionals, and apprentices are invited to attend the Toronto Congress Centre on Wednesday, November 4, 2026. The Ontario Apprenticeship Summit 2026 is focused… Read More…

  • Fort McMurray Apprentice Electrician to Represent Canada at Skilled Canada National Competition

    Fort McMurray Apprentice Electrician to Represent Canada at Skilled Canada National Competition

    July 6, 2026 In recognition of World Youth Skills Day, which underscores the vital role of skills development among young people, Skills/Compétences Canada (SCC) is proud to officially announce the 31 talented members of WorldSkills Team Canada 2026.These young competitors will begin their training to prepare for the 48th WorldSkills Competition, in Shanghai, China, which will be held… Read More…

  • Westburne Celebrates 100 Years with Brandon Trade Show

    Westburne Celebrates 100 Years with Brandon Trade Show

    July 6, 2026 Recently, Westburne hosted over 200 guests and over 60 partners and suppliers at their Brandon Trade Show to celebrate 100 years of Westburne. “Westburne’s annual Midwest Tradeshow welcomed more than 220 attendees in Brandon this year, including representatives from over 60 partner businesses and suppliers. Taking place annually for over 15 years,… Read More…

  • B.C. Expands Energy Efficiency Program to Provide No-Cost Retrofits to Homeowners, Tenants

    B.C. Expands Energy Efficiency Program to Provide No-Cost Retrofits to Homeowners, Tenants

    July 3, 2026 Together with BC Hydro, FortisBC and Natural Resources Canada, the Province is supporting families with lower incomes to save money on their utility costs through home-energy improvements.  “We are taking action to help people lower their utility bills by expanding our home energy-efficiency programming for lower-income families,” said Adrian Dix, B.C.’s Minister… Read More…