4
1MRS 751108-MUM
Protection Relay
Technical Reference Manual, General
REX 521
4.1.12.4.SPA bus .............................................................25
4.1.12.5.LON bus ............................................................26
4.1.12.6.IEC 60870-5-103 bus ........................................28
4.1.13.Time synchronization .......................................................29
4.1.14.Display panel (HMI) .........................................................29
4.1.15.Indication LEDs ...............................................................30
4.2. Design description ......................................................................30
4.2.1. Technical data .................................................................30
4.2.2. Terminal diagram of the REX 521: Basic .........................34
4.2.3. Terminal diagram of the REX 521: Medium .....................35
4.2.4. Terminal diagram of the REX 521: High ..........................36
4.2.5. Terminal diagram of the REX 521: Sensor ......................37
4.2.6. Terminal connections ......................................................38
5. Service ..................................................................................... 40
6. Ordering information ............................................................. 41
7. Revision history of the REX 521 ........................................... 42
7.1. Revision identification .................................................................42
7.2. Changes and additions to earlier released revision A ................42
7.3. Configuration, setting and SA system tools ................................42
8. References .............................................................................. 43
9. Index ........................................................................................ 44
10.Customer feedback ............................................................... 46
11.Appendix A: The IEC 60870-5-103 bus ................................ 48
11.1.Functions supported by the REX 521 ........................................48
11.2.The general principle of application data mapping .....................48
11.3.The principle of the protection functions mapping ......................49
11.4.Class 2 data ...............................................................................49
11.5.Default mappings .......................................................................50
12.Appendix B: Parameters visible only in the relay .............. 57
13.Appendix C: Parameters which cause reset ....................... 58
14.Appendix D: Parameters which require test mode ............ 60
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Version B/5.7.2002:
- changes in chapters “General”, “Hardware versions”, “Analogue channels”, “Setting the rated values
for the protected unit”, “Technical data of the measuring devices”, “Single-pole power outputs (PO)”,
“Trip-circuit supervision”, “Technical data”, “Ordering information”
- new terminal diagrams and terminal connections (High and Sensor)
- new chapters: “Revision history”, “Revision history of the REX 521”, “Index” and “Appendix D”
