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HOME >> NEWS >> ABB Feeder Protection Relay REX 521 REX521

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ABB Feeder Protection Relay REX 521 REX521

From:ABB | author:Make | Release :2025-04-28 | 15 view: | Share:

REX 521 protection relay

The protection relay REX 521 is designed for protection, control, measuring and

supervision in medium voltage networks. Typical applications include incoming and

outgoing feeders as well as substation protection. The protection relay is provided

with energizing inputs for conventional current and voltage transformers. Also a

hardware version with inputs for current and voltage sensors is available.

The protection relay is based on a multiprocessor environment. The HMI including

an LCD (liquid chrystal display) with different views makes the local use easy and

informs the user via indication messages. Modern technology is applied both in

hardware and software solutions.

The REX 521 is part of the substation automation concept for distribution

automation and extends the functionality and flexibility of the concept.


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