Date Code 20170601 Instruction Manual SEL-387-0, -5, -6 Relay
Appendix B
SEL-300 Series Relays
Firmware Upgrade Instructions
Overview
These firmware upgrade instructions apply to all SEL-300 series relays except
the SEL-321 series relays (which use EPROM instead of Flash).
SEL occasionally offers firmware upgrades to improve the performance of
your relay. Changing physical components is unnecessary because the relay
stores firmware in Flash memory.
A firmware loader program called SEL
BOOT resides in the relay. To upgrade
firmware, use the SEL
BOOT program to download an SEL-supplied file from a
personal computer to the relay via any communications port. This procedure is
described in the following steps.
NOTE: SEL strongly recommends
that you upgrade firmware at the
location of the relay and with a direct
connection from the personal computer
to one of the relay serial ports. Do not
load firmware from a remote location;
problems can arise that you will not be
able to address from a distance. When
upgrading at the substation, do not
attempt to load the firmware into the
relay through an SEL communications
processor.
Perform the firmware upgrade process in the following sequence:
A. Prepare the Relay
B. Establish a Terminal Connection
C. Save Settings and Other Data
D. Start SEL
BOOT
E. Download Existing Firmware
F. Upload New Firmware
G. Check Relay Self-Tests
H. Verify Settings, Calibration, Status, Breaker Wear, and
Metering
I. Return the Relay to Service
Required Equipment
Gather the following equipment before starting this firmware upgrade:
➤ Personal computer
➤ Terminal emulation software that supports 1K Xmodem or
Xmodem (these instructions use HyperTerminal from a
Microsoft
®
Windows
®
operating system)
➤ Serial communications cable (SEL Cable C234A or equivalent)
➤ Disk containing the firmware upgrade (.s19 or .exe) file
➤ Firmware Upgrade Instructions (these instructions)
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