32 Categories
Categories
This document uses the following categories to classify changes.
Revision categories
Code Category Description
A Hardware change
This change may require hardware to be updated and/or
replaced
N New feature
A separate feature added to the relay. Changes to existing
features even if they significantly expand the functionality are
not in this category.
G Change
A neutral change that does not add new value and is not
correcting any known problem
E Enhancement
Modification of an existing feature bringing extra value to the
application
D
Changed, incomplete, or false
faceplate indications
Changes to, or problems with text messages, LEDs, and user
pushbuttons
R
Changed, incomplete, or false relay
records
Changes to, or problems with relay records (oscillography,
demand, fault reports, and so on)
C Protocols and communications
Changes to, or problems with protocols or communication
features
M Metering Metering out of specification or other metering problems
P Protection out of specification
Protection operates correctly but does not meet published
specifications (example: delayed trip)
U Unavailability of protection
Protection not available in a self-demonstrating way so that
corrective actions can be taken immediately
H Hidden failure to trip Protection does not operate when appropriate
F False trip Protection operates when it is not appropriate
B Unexpected restart Relay restarts unexpectedly
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