A.6
SEL-351A Relay Instruction Manual Date Code 20080213
Firmware and Manual Versions
Firmware
This firmware differs from the previous version as follows:
SEL-351A-1-R402-V0-Z001001-D20071226
➤ Changed default length of compressed event reports to match
LER setting.
➤ Corrected an event reporting problem that occurred in the pres-
ence of heavily distorted current waveforms. This problem led
to errors in oscillography, event summary currents, and “pk”
current indicators. (Note: This problem did not affect protection
functions.)
20071226
This firmware differs from the previous version as follows:
SEL-351A-1-R401-V0-Z001001-D20070725
➤ Manual update only. See Table A .3 for description of updates. 20071219
This firmware differs from the previous version as follows:
SEL-351A-1-R401-V0-Z001001-D20070725 ➤ Corrected problem that caused intermittent 50G element opera-
tion. Problem only manifests on systems with load current very
near nominal current, and with high harmonic content.
20070725
SEL 351A-1-R400-V0-Z001001-D20070115
➤ Original Firmware Release 20070117
Table A.2 SEL-351A-1 Firmware Revision History (Sheet 2 of 2)
Firmware Part/Revision No. Description of Firmware
Manual
Date Code
Courtesy of NationalSwitchgear.com
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