Sel 421 - Page 328

U.A.20
SEL-421 Relay User’s Guide Date Code 20090715
Firmware and Manual Versions
Instruction Manual
Section 10
➤ Corrected typographical errors.
➤ Updated Table 10.5, Table 10.6, Table 10.7, and Table 10.8 for the changes in the Control Inputs, Main Board
Control Inputs, Interface Board #1 Control Inputs, and Interface Board #2 Control Inputs settings.
➤ Added 15 option to the range of MRATE setting in Table 10.19.
➤ Added new front-panel settings categories to Table 10.78.
➤ Added new setting SCROLD to Table 10.80.
➤ Added new front-panel settings Table 10.81 and Table 10.82.
➤ Split Display Points and Aliases table into two separate tables, Table 10.81 and Table 10.82, for Boolean and
Analog Display Points.
➤ Added new setting parameter HMI Alarm to Table 10.86.
Appendix A
➤ Corrected typographical errors.
Appendix B
➤ Corrected typographical errors.
20051107 Revised entire manual to include new DNP3 LAN/WAN functionality.
20050805
General
➤ Added independent two-breaker reclosing functionality (E79 := Y1).
User’s Guide
Section 4
➤ Added note describing internal clock year value behavior in TIME Q Descriptions.
Appendix A
➤ Updated Tab l e A.1 with firmware version R114.
Applications Handbook
Section 1
➤ Added text explaining auto-reclose sequence for both dependent (E79 := Y) and independent (E79 := Y1)
two-breaker reclosing applications.
➤ Updated E79 entries in Ta ble 1.6 , Table 1.13, Table 1.21, Table 1.31, and Table 1.39.
➤ Added E79 row to Table 1.40.
Reference Manual
Section 1
➤ Updated Figure 1 26.
➤ Updated Figure 1 63 to match firmware change.
➤ Updated Figure 1 65.
Section 2
➤ Added text explaining two auto-reclose modes available for two-breaker reclosing applications.
➤ Added text explaining single-pole open interval supervision condition (SPOISC) and corresponding timer
(SPOISD) for single-pole two-circuit-breaker auto-reclosing applications.
➤ Added text detailing both dependent (E79 := Y) and independent (E79 := Y1) three-pole two-circuit-breaker
auto-reclosing applications.
➤ Added text explaining three-pole open interval supervision condition (3POISC) and corresponding timer
(3POISD) for three-pole two-circuit-breaker auto-reclosing applications.
➤ Modified Figure 2 6 title (added “E79 := Y”).
➤ Added Figure 2 7 (“Line-Open Logic Diagram When E79 := Y1”).
➤ Modified Figure 2 13 title (added “E79 := Y”).
➤ Modified Figure 2 15 title (added “E79 := Y”).
➤ Updated E79 entries in Table 2 19 and Table 2 20.
Table A.5 Instruction Manual Revision History (Sheet 10 of 16)
Revision Date Summary of Revisions
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