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

  • Maximizing Excel: Practical Use Cases for Preconstruction

    Maximizing Excel: Practical Use Cases for Preconstruction

    November 8, 2024 By Melvin Newman Excel is a powerful and flexible tool that can enhance efficiency in electrical construction estimating.  Spreadsheets, like those in Excel, consist of a grid of “cells” where each cell can hold various types of data. Originating from mainframe computers in the 1960s and later developed for Apple computers in… Read More…

  • The Non-Residential Sector Declines in All Three Components Despite Sustained Industrial Permit Level

    The Non-Residential Sector Declines in All Three Components Despite Sustained Industrial Permit Level

    November 4, 2024 The total value of building permits in Canada decreased by $858.1 million (-7.0%) to $11.5 billion in August, following a strong July during which construction intentions rose sharply (+20.8%). The residential and non-residential sectors contributed to the decrease in August. On a constant dollar basis (2017=100), the total value of building permits decreased 7.6% in… Read More…

  • A Slight Decrease in Residential Building Construction for August

    A Slight Decrease in Residential Building Construction for August

    November 4, 2024 Investment in building construction edged up 0.2% to $21.0 billion in August, after a 1.6% decrease in July. The residential sector edged down (-0.1%) to $14.6 billion, while the non-residential sector was up 1.0% to $6.4 billion. Year over year, investment in building construction grew 7.2% in August. On a constant dollar basis (2017=100), investment in building construction was… Read More…

  • When a Familiar Door Closes

    When a Familiar Door Closes

    November 4, 2024 By Keith Sones, seasoned utility industry executive Most of the articles I’ve written have been based on personal experiences, many of them occurring decades ago, which eventually translate into helpful life lessons. The years allow the events to marinate in a savoury stew of time and reflection, clarity never coming immediately, or even… Read More…


Changing Scene