U.A.15
Date Code 20090715 User’s Guide SEL-421 Relay
Firmware and Manual Versions
Instruction Manual
Section 6
➤ Updated Figure 6.8 for Alias impact.
Appendix A
➤ Updated for firmware version R122.
Applications Handbook
Section 1
➤ Updated 3I0n 51S quantity in the following:
➢ 230 kV Overhead Transmission Line Example and Tab le 1 . 6.
➢ 500 kV Parallel Transmission Lines With Mutual Coupling Example and Table 1.13.
➢ 345 kV Tapped Overhead Transmission Line Example and Table 1.21.
➢ EHV Parallel 230 kV Underground Cables Example and Table 1 .31.
Section 3
➤ Added INT3 to Data Processing.
➤ Added Alias Names to Event Reports, Event Summaries, and Event Histories.
➤ Updated Digital Section of the Event Report and Settings Section of the Event Report for Alias impact.
➤ Updated Figure 3.12 and Figure 3.13 to include Alias settings.
Section 6
➤ Updated Tab l e 6.3 to include new database region 20 messages.
Reference Manual
Section 1
➤ Updated Figure 1.17 to decrease LOP latching delay from 60 cycles to 15 cycles.
➤ Updated Tab l e 1.56, Ta b le 1.57, and Table 1 .58 for 3I0n 51S quantity.
➤ Updated Figure 1.70 to include NUMBK = 2 logic input.
Section 3
➤ Added Aliases to Table 3.1.
➤ Updated Tab l e 3.2 and Tab le 3 .13 to include 32 conditioning timers.
➤ Added Aliases.
➤ Added Example 3.10.
➤ Updated Tab l e 3.28 to include 32 conditioning timers.
Section 5
➤ Updated Tab l e 5.10 to include Alias settings.
Section 6
➤ Updated Tab l e 6.6 for new settings EVELOCK, MINDIST, and MAXDIST.
➤ Updated Tab l e 6.7 new setting for MAPSEL.
➤ Updated Default Data Map to explain new reference maps.
➤ Updated Tab l e 6.10 to include two reference maps and new index 182.
➤ Added Reading Relay Event Data section.
➤ Corrected Bit values in Table 6.14.
➤ Updated Figure 6.2 for new setting MAPSEL.
➤ Updated Tab l e 6.18 for new settings EVELOCK, MINDIST, and MAXDIST.
Section 9
➤ Added SET T and SHO T commands.
➤ Updated TAR command to include aliases.
Table A.5 Instruction Manual Revision History (Sheet 5 of 16)
Revision Date Summary of Revisions
Courtesy of NationalSwitchgear.com
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