EasyManuals Logo

ABB REX 521 Technical Reference Manual, General

ABB REX 521
76 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #9 background imageLoading...
Page #9 background image
1MRS 751108-MUM
REX 521
9
Protection Relay
Technical Reference Manual, General
2. Introduction
2.1. General
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
1
(Human-
Machine Interface) including an LCD (Liquid Crystal 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 further.
Fig. 2.1.-1 REX 521 protection relay
1. HMI is referred to as MMI (man-machine interface) in the relay and in the Relay
Setting Tool.

Table of Contents

Other manuals for ABB REX 521

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the ABB REX 521 and is the answer not in the manual?

ABB REX 521 Specifications

General IconGeneral
BrandABB
ModelREX 521
CategoryOther
LanguageEnglish

Related product manuals