ABB REX 521 - Default Chapter; Table of Contents

Protection Relay
Technical Reference Manual, General
©Copyright 2004 ABB Oy, Distribution Automation, Vaasa, FINLAND 3
REX 521
1MRS 751108-MUM
Issued: 27.06.2001
Version: F/10.08.2004
Contents
1. About this manual .....................................................................6
1.1. Copyrights .....................................................................................6
1.2. Trademarks ...................................................................................6
1.3. General .........................................................................................6
1.4. Abbreviations ................................................................................7
1.5. Related documents .......................................................................7
1.6. Document revisions .......................................................................8
1.7. Safety information .........................................................................8
2. Introduction ...............................................................................9
2.1. General .........................................................................................9
2.2. Application ...................................................................................10
2.3. Hardware versions ......................................................................12
3. Requirements ..........................................................................13
4. Technical description .............................................................14
4.1. Functional description .................................................................14
4.1.1. Parametrization ................................................................14
4.1.1.1. Local parametrization .........................................14
4.1.1.2. External parametrization ....................................14
4.1.1.3. Relay Setting Tool view ......................................15
4.1.1.4. Graphical I/O Setting Tool ..................................16
4.1.1.5. Factory settings ..................................................16
4.1.2. Non-volatile memory ........................................................17
4.1.3. Real-time clock ................................................................17
4.1.4. Auxiliary voltage ...............................................................18
4.1.4.1. Power supply versions .......................................18
4.1.4.2. Low auxiliary voltage indication ..........................18
4.1.5. Overtemperature indication ..............................................19
4.1.6. Analog channels ..............................................................19
4.1.6.1. Scaling the rated values of the protected unit
for analog channels 19
4.1.6.2. Technical data of the measuring devices ...........20
4.1.6.3. Calculated analog channels ...............................22
4.1.6.4. Select Io .............................................................22
4.1.6.5. Rated frequency .................................................22
4.1.7. Digital inputs ....................................................................22
4.1.7.1. Filtering of digital inputs .....................................22
4.1.7.2. Inversion of digital inputs ....................................23
4.1.8. Outputs ............................................................................23