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UR Family Firmware 5.84 - Release Notes
Description: The phase selector can incorrectly declare the fault type as PHASE SELECT 3P after all
currents are reduced to zero during switch-off events, where the phase selector was to declare PHASE
SELECT VOID. There is no impact on the protection performance unless PHASE SELECT 3P is used in logic,
for example to inhibit reclosure for three-phase faults. The new releases fix the issue.
GE tracking number: 726-3,
P
Corrected echo logic in the 1P POTT pilot scheme
Products: D60, L90
Impacted firmware: All to 6.05, 7.00 to 7.26, 7.30 to 7.32
Corrected firmware: 5.84, 6.06, 7.27, 7.40 and up
Workaround: None
Description: Adding an MMS client that polls for data prevents the issue
Description: In the one-pole POTT pilot scheme, if the Permissive RX signal is continuously ON, the echo
signal oscillates (echo signal is repeated following ECHO DURATION and ECHO DURATION settings timers).
The new releases fix the issue. Echoed logic is modified so that the received RX signal is echoed once only
with a settable duration and a lockout period.
The new releases fix the issue.
GE tracking number: 740-12
U
Setting Group elements have been changed to prevent taking relays out of service when switching
setting groups
Products: D30, D60, G60, L60, L90, T60
Impacted firmware: All to 5.83, 5.84 to 6.02 and 6.04 and above
Corrected firmware: 5.84, 6.03
Workaround: None
Description: Setting group switching is a fast operation that, under normal conditions, should not trigger
any self-test alarm. Some UR devices with previous firmware revisions have shown that switching setting
groups can activate a major self-test alarm (Module failure 5) that takes the relay out-of-service. The relay
has to be rebooted to get it back in service. This firmware release ensures that UR relays do not trigger
unnecessary alarms when switching setting groups. End users whose URs are not configured for
switching setting groups are not affected by this issue. For details on setting group switching, see the
instruction manual of any applicable UR device.
GE tracking number: 603-3
P
Corrected echo duration and lockout feature in pilot schemes
Products: All with POTT, POTT1, hybrid POTT (D60, L90)
Impacted firmware: All to 7.27, 7.30 and above
Corrected firmware: 5.84, 7.28
Workaround: None
Description: The echo duration and lockout features in POTT, POTT1, and hybrid POTT schemes are not as
per design. The Tx signal from Echo strictly follows Rx, instead of providing a deterministic pulse per "Echo
Duration" and "Echo Lockout" settings regardless of the shape of the Rx. The new release corrects the
issue.
GE tracking number: 728-4
P
Corrected Phase Distance dropout of zone 2 operate operand
Products: All with Phase Distance (D30, G60, L60, L90, T60)
Impacted firmware: All to 6.06, 7.00 to 7.11
Corrected firmware: 5.84, 6.07, 7.20 and up
Workaround: None