Sel 421 - Page 327

U.A.19
Date Code 20090715 User’s Guide SEL-421 Relay
Firmware and Manual Versions
Instruction Manual
Section 2
➤ Revised Example 2.3 and Example 2.4.
➤ Corrected name of Relay Word bit B1ITAL to B1BITAL.
➤ Corrected typographical errors.
➤ Corrected range for EDEM in Table 2.20.
Section 3
➤ Corrected typographical errors.
➤ Modified Setting SER Points and Aliases section to reflect new SER setting parameter HMI Alarm.
➤ Updated Figure 3.1 to include Main Board A and Main Board B and Interface Boards INT1, INT2, INT4,
INT5, INT6, INT7, and INT8.
➤ Added IN101 through IN107 analog channels in Figure 3.5.
Section 4
➤ Corrected Figure 4.5 and Figure 4.6.
Section 6
➤ Added note about IRIG-B time signal and high-accuracy IRIG timekeeping.
Reference Manual
Section 1
➤ Corrected Relay Word bit names DSTART to DSTRT and NSTART to NSTRT.
➤ Corrected a cross reference in Table 1.13.
➤ Corrected Figure 1.25.
➤ Corrected Figure 1.26.
➤ Corrected Figure 1.68.
➤ Added the heading Trip Logic Settings and Relay Word Bits, text, and footnotes to Table 1.72.
➤ Corrected Relay Word bit names BTPA to ATPB and CTPA to ATPC in Table 1.73.
Section 2
➤ Changed title of section to Auto-Reclosing and Synchronism Check.
➤ Deleted duplicative Figure 2.10: Voltage Check Elements.
➤ Added note about voltage check elements and synchronism check feature.
➤ Corrected Figure 2.21 and Figure 2.22.
Section 3
➤ Corrected typographical errors.
Section 4
➤ Corrected cross references on first page.
Section 5
➤ Corrected typographical error.
➤ Updated Table 4.4.
Section 6
➤ Corrected typographical errors.
➤ Added information about setting TIMERQ.
Section 7
➤ Added footnote to Table 7.9.
➤ Added a row (15 option to the range of MRATE in the Global setting class) to Table 7.11.
➤ Corrected typographical errors.
➤ Corrected footnote to Table 7.16.
Section 9
➤ Corrected typographical errors.
➤ Corrected Table 9.113.
Table A.5 Instruction Manual Revision History (Sheet 9 of 16)
Revision Date Summary of Revisions
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