U.A.3
Date Code 20090715 User’s Guide SEL-421 Relay
Firmware and Manual Versions
Firmware
SEL-421-2-R123-V0-Z010010-D20070223
SEL-421-3-R123-V0-Z010010-D20070223
➤ Added support for synchrophasors over Ethernet.
➤ Added TLED_17 through TLED_24 and PB9_LED through
PB12_LED to the Fast Message response.
➤ Corrected intermittent pickup of RTDCOMF bit when connected
to an SEL-2600.
➤ Expanded diagnostics coverage to include additional failure
modes that will result in a relay restart.
➤ Modified frequency and rate-of-change of frequency (DFDT)
measurements in the synchrophasor data packet. These quantities
are now calculated using synchrophasor data.
➤ Added a new global setting (IRIGC) that selects if the IRIG signal
uses the C37.118 control bits.
➤ Added Ethernet card information in the ID command.
20070223
SEL-421-R201-V0-Z007007-D20070220
SEL-421-1-R201-V0-Z007007-D20070220
➤ Made enhancements to diagnostics. Expanded coverage to
include additional failure modes that will result in a relay restart.
20070223
SEL-421-2-R122-V0-Z009009-D20061215
SEL-421-3-R122-V0-Z009009-D20061215
Note: This firmware version was not production released. See R123
above.
➤ Added support for expanded HMI features: auxiliary {TRIP}/
{CLOSE} pushbuttons, 12 operator control pushbuttons, 24 target
LEDs, double-height display points, and tri-colored LEDs.
➤ Added Alias Settings class.
➤ Added new DNP setting MAPSEL and implemented extended
binary input map.
➤ Implemented DNP single-event mode.
➤ Increased number of SELOGIC conditional timers from 16 to 32.
➤ Decreased LOP latching delay from 60 cycles to 15 cycles.
➤ Added Fast Message commands to read database regions.
➤ Added 3I01 and 3I02 to Selectable Operating Quantity Inverse-
Time Overcurrent Elements (51S).
➤ Restrained DNP power factor binary inputs from updating if
voltage falls below 10 percent of nominal or Open Phase
Detection Logic asserts.
➤ Modified HMI password entry so that characters are not echoed
to the screen.
20061215
SEL-421-2-R121-V0-Z008008-D20060814
SEL-421-3-R121-V0-Z008008-D20060814
SEL-421-R200-V0-Z007007-D20060814
SEL-421-1-R200-V0-Z007007-D20060814
➤ Modified diagnostic failure mode management. Certain
diagnostic test errors will result in a relay restart. Relay will log
Diagnostic Restart in the SER if this event occurs.
20060814
SEL-421-2-R120-V0-Z008008-D20060808
SEL-421-3-R120-V0-Z008008-D20060808
Note: This version was not released from
the factory.
➤ Fixed incorrect metering condition following a pulse of the
Alternate Voltage Source (ALTV) or Alternate Current Source
(ALTI) SEL
OGIC equations.
➤ Enhanced rms metering to properly measure analog quantities
with greater than 50% harmonic content.
20060808
SEL-421-2-R119-V0-Z008008-D20060710
SEL-421-3-R119-V0-Z008008-D20060710
➤ Improvement to automatic removal of chattering SER points
where the status of the chattering element is reported after it is
reinserted in the SER record.
➤ Improvement to dropout time of breaker failure overcurrent fault
detector under extreme subsidence current conditions.
20060710
Table A.1 Firmware Revision History (Sheet 3 of 9)
Firmware Identification (FID) Number Summary of Revisions
Manual
Date Code
Courtesy of NationalSwitchgear.com
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