A.2
SEL-351A Relay Instruction Manual Date Code 20080213
Firmware and Manual Versions
Firmware
This firmware differs from the previous version as follows:
SEL-351A-R401-V0-Z008006-D20070725
➤ Corrected problem that caused intermittent 50G element opera-
tion. The problem only manifests on systems with load current
very near nominal current and with high harmonic content.
20070725
This firmware differs from the previous version as follows:
SEL-351A-R400-V0-Z008006-D20070117
Protection
➤ Added support for new SEL Fast Message Synchrophasor pro-
tocol, event reporting, and metering.
Reporting
➤ Changed default event report and compressed event report com-
mand length to follow Global Setting LER.
Communications
➤ Lowered Port 1 maximum speed from 38.4 kbps to 19.2 kbps.
20070117
This firmware differs from the previous version as follows:
SEL-351A-R112-V0-Z007005-D20060717
➤ Corrected negative-sequence directional element operation for
delta systems when Z1ANG is set low.
➤ Improved fault targeting for lightly loaded ungrounded systems.
➤ Added Z0MTA setting to allow use of Best Choice Ground
Directional Element™ logic on systems with a neutral earth
resistor.
20060717
This firmware applies to the manual date code listed:
SEL-351A-R110-V0-Z006005-D20041210
➤ Manual update only. See Table A .3. 20050518
This firmware differs from the previous version as follows:
SEL-351A-R110-V0-Z006005-D20041210
➤ Added E79 setting options for enhanced recloser supervision
applications.
20041210
➤ Allow phase and negative-sequence time overcurrent element
pickups to be set more sensitively.
➤ Improve accuracy of voltage elements.
➤ Improve password security.
➤ Remove (*) indication of max current from raw event report.
➤ Allow Z1ANG and Z0ANG settings to be set as low as
5degrees.
➤ Power Factor values found in DNP and ASCII communication
now match in resolution when polled simultaneously.
➤ Improved the timing of the setting group Relay Word Bit SGn to
update after a settings group change instead of during.
➤ DNP event report now uses peak values instead of cosine-fil-
tered values when an event is triggered by the Adaptive Over-
current Element.
➤ Improved the voltage scaling in the loss-of-potential (LOP)
logic.
➤ DNPE was improved to automatically refresh all stored values
upon any DNPE settings change.
➤ Improved initialization of communication ports when changing
protocols.
➤ Setting PSTDLY in DNP setting to 0 time delay was improved
to end communications faster.
This firmware differs from the previous version as follows:
Table A.1 SEL-351A Firmware Revision History (Sheet 2 of 5)
Firmware Part/Revision No. Description of Firmware
Manual Date
Code
Courtesy of NationalSwitchgear.com
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