Date Code 20100129 Instruction Manual SEL-751A Relay
Appendix A
Firmware and Manual Versions
Firmware
Determining the
Firmware Version
in Your Relay
To find the firmware version number in your SEL-751A Feeder Protection
Relay, use the STA command (see STATUS Command (Relay Self-Test Status)
on page 7.39 for more information on the STA command). The firmware
revision number is after the R, and the release date is after the D. For example,
the following is firmware revision number 100, release date April 10, 2007.
FID=SEL-751A-R100-V0-Z001001-D20070410
Table A.1 through Table A.4 list the firmware versions, a description of
modifications, and the instruction manual date code that corresponds to
firmware versions. The most recent firmware version is listed first.
Table A.1 400 Series Firmware Revision History
Firmware Identification (FID) Number Summary of Revisions Manual Date Code
SEL-751A-R402-V0-Z006003-D20100129 ➤ Added faulted phase Identification logic and included the
faulted phase information in the Event Summary Report
Event Type field. Also made it available in the Modbus
Map.
Firmware revision R402 is for upgrading relays with R400 or
higher firmware only.
20100129
SEL-751A-R401-V0-Z005003-D20100118
➤ Corrected an occasional IEC 61850 communications defect
where the firmware incorrectly reads an opcode from Flash
memory and results in a vector.
Firmware revision R401 is for upgrading relays with R400 or
higher firmware only.
20100118
SEL-751A-R400-V0-Z005003-D20090910
➤ Revised firmware for processor update. Previous versions
cannot be upgraded to R400.
➤ Extended event report storage capability to at least seventy-
seven 15-cycle or nineteen 64-cycle event reports.
20090910
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