U.A.21
Date Code 20090715 User’s Guide SEL-421 Relay
Firmware and Manual Versions
Instruction Manual
Section 10
➤ Updated E79 entry in Table 10 29.
➤ Updated Table 10 64 to include new settings SPOISC and SPOISD.
➤ Updated Table 10 65 to include new settings 3POISC and 3POISD.
Appendix A
➤ Updated Tab l e A.1 to include new Relay Word Bits SPOISC and 3POISC.
➤ Updated Tab l e A.2 footnote describing internal clock year value behavior.
➤ Updated Tab l e A.9 to include new Relay Word Bits SPOISC and 3POISC.
➤ Updated Tab l e A.50 footnote describing internal clock year value behavior.
20050119
User’s Guide
Appendix A
➤ Updated Tab l e A.1 and Table A.5 with firmware version R113.
20041217
General
➤ Changed DNP 3.0 to DNP3 throughout manual.
➤ Added contents list to the start of each section.
➤ Added Glossary entries for C37.118, Fast Message, IEEE, RTD, Time Error, Time Quality, and TVE.
➤ Updated Glossary entry for PPS.
User’s Guide
Section 1
➤ Updated Specifications.
Section 2
➤ Added INT4 I/O Interface Board information, including instructions for using the optoisolated control inputs
to detect ac control signals.
➤ Updated rear-panel figures and related text to show new TIME input configuration.
➤ Removed Front-Panel Labels—the configurable label instructions are now in a separate package included
with the relay.
Section 3
➤ Updated ACSELERATOR SEL-5030 screen captures and related text.
Section 4
➤ Updated ACSELERATOR SEL-5030 screen captures and related text.
➤ Updated serial number label in Figure 4 1 and related text.
➤ Added Access Level information to Ta ble 4 5.
➤ Added INT4 I/O Interface Board control inputs information and Figure 4 8.
➤ Updated Configuring High-Accuracy Timekeeping subsection.
Section 6
➤ Updated ACSELERATOR SEL-5030 screen captures and related text.
Appendix A
➤ Updated Tab l e A.1 and Table A.5 with firmware version R112 and literature changes.
Applications Handbook
Section 2
➤ Updated Time-Synchronized Metering.
Section 3
➤ Updated Figure 3.1.
Section 4
➤ Updated Relay Configuration for High-Accuracy Timekeeping.
➤ Updated State Estimation Verification.
Section 6
➤ Updated Tab l e 6.7.
Table A.5 Instruction Manual Revision History (Sheet 11 of 16)
Revision Date Summary of Revisions
Courtesy of NationalSwitchgear.com
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