ABB REX 521 Feed Line and Motor Protection Relay Operation Manual

This document is the operation manual for REX 521 feeder and motor protection relay, which describes the features and functions of the product.

ABB REX 521 Feed Line and Motor Protection Relay Operation Manual - cover page
Brand
REX
Document type
User Manual
Language
Chinese
Pages
39
File format
PDF
File size
6.1 MB
Published
22 February, 2012
Updated
29 September, 2023
MD5 checksum
65ABF8D7C0041F7BFE78312EDBD3B8BD
PDF
ABB REX 521 Feed Line and Motor Protection Relay Operation Manual PDF

About this manual

This manual introduces the REX 521 feed line and motor protection relay, describing its purpose, safety requirements, and basic features such as the LCD HMI, multi‑processor architecture, and AC current/voltage transformer inputs. It also lists related documents and revision history.

The guide details HMI characteristics, button functions, menu navigation, parameter settings, LED indicators, and various test modes (I/O, IRF, function module). Safety information, self‑test procedures, and troubleshooting tips are included to ensure proper installation and operation. This manual is written in Chinese.

What's inside

  • About This Manual
  • Safety Information
  • Introduction
  • HMI Features
  • Button Functions
  • Menu Overview
  • Parameter Settings
  • Testing Modes
  • LED Indicators
  • Index

Specifications

Input terminalsAC current and voltage transformer inputs
Processor architectureMulti‑processor environment
DisplayLCD with multiple views

Frequently asked questions

What safety precautions are required when installing the REX 521 relay?

Installation must be performed by qualified electricians, the device must be properly grounded, and all national and local electrical safety regulations must be followed.

How can the language be changed on the HMI?

The language can be changed by using a specific button combination on the front panel.

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