Sel 421 - Table A.1 Firmware Revision History

Date Code 20090715 User’s Guide SEL-421 Relay
Appendix A
U.User’s Guide
Firmware and Manual Versions
Firmware
Determining the
Firmware Version in
Your Relay
To find the firmware revision number in your relay, view the status report
using the serial port STATUS command. The status report displays the Firm-
ware Identification (FID) label:
FID=SEL-421-Rxxx-Vx-Zxxxxxx-Dxxxxxxxx, or
FID=SEL-421-x-Rxxx-Vx-Zxxxxxx-Dxxxxxxxx
You can also view the FID label from the front panel. From the
ROTATING
DISPLAY
front-panel screen, press the {ENT} pushbutton to advance to the MAIN
MENU
screen. Use the {Down Arrow} pushbutton to highlight the RELAY STATUS
option, and press the {ENT} pushbutton. The FID label displays on the screen:
SEL-421-Rxxx-Vx-Zxxxxxx-Dxxxxxxxx, or
SEL-421-x-Rxxx-Vx-Zxxxxxx-Dxxxxxxxx
In the FID label, the firmware revision number follows the R and the release
date follows the D.
For example,
FID=SEL-421-R115-V0-Z006005-D20051107
is firmware revision number 115, release date November 7, 2005.
Table A.1 lists 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 Firmware Revision History (Sheet 1 of 9)
Firmware Identification (FID) Number Summary of Revisions
Manual
Date Code
SEL-421-2-R128-V0-Z012011-D20090428
SEL-421-3-R128-V0-Z012011-D20090428
➤ Manual update only (see Table A.5). 20090715
SEL-421-2-R128-V0-Z012011-D20090428
SEL-421-3-R128-V0-Z012011-D20090428
➤ Manual update only (see Table A.5). 20090529
SEL-421-2-R128-V0-Z012011-D20090428
SEL-421-3-R128-V0-Z012011-D20090428
➤ Improved accuracy of fault locator when used with a fast breaker
by using only full-cycle data.
➤ Improved loss-of-potential handling during the transition of a
breaker from opened to closed.
➤ Corrected handling of DNP fault summary records when
EVELOCK = 0.
20090428
Courtesy of NationalSwitchgear.com