4
UR Family Firmware 5.80 - Release Notes
N New operation mode for the Phase Comparison Elements enable the L60 to interface with other
manufacturers legacy phase comparison devices
Products: L60
Corrected firmware: 5.80
Description: The Phase Comparison operation mode can be set through the type of “signal” setting. A new
mode of operation “mixed I_1 + I_2/K” has been added to the other two existing choices. The L60’s K
factor range is 0.08 to 0.25, therefore this mode is equivalent to other manufacturers’ mode “mixed I_1 +
K* I_2” for which K factor range is 4 to 12.5. This new operation mode makes the L60 compatible with
other manufacturers’ installed legacy phase comparison relays that use the operation mode indicated
above. So the Phase Comparison Element can interface with those devices (for example, L60 at one end of
the line and another manufacturer’s legacy device installed at the opposite end of the line).
GE tracking number: 580-10
U
L90 inter-relay communication for three-terminal schemes has been changed to ensure
communication is restored between all L90 devices when a channel failure condition is cleared
Products: L90
Impacted firmware: 4.9x, 5.2x, 5.4x, 5.6x and 5.7x
Corrected firmware: 5.80
Description: As standard behavior, a three terminal line differential scheme raises “PFLL Fail”
(synchronization status) and “CH fail” operands at all three terminals when both communication channels
fail on at least one terminal. However, if only one channel goes back to normal, L90s at all terminals can
still show PFLL fail and CH Fail, and neither the communication nor the differential protection are restored.
This issue only affects relays with FW version 4.9x, 5.2x, 5.4x, 5.6x and 5.7x. If your relay firmware version
is different to the ones mentioned, no action is required.
GE tracking number: 553-3
Motor Protection Systems M60
F
Changes on the Thermal Model element prevents inadvertent operation while the relay is in
maintenance for the purpose of replacing a CPU module
Products: M60
Corrected firmware: 5.54, 5.80
Description: The Thermal Model protection element has been modified to ensure that the element does
not operate when the relay is powered up after replacing the CPU module. Previous firmware versions can
allow the element to operate when under the described maintenance condition. If your maintenance
procedure requires the motor to be stopped or your trip command to be isolated when working on the
protection relay, the described exception does not affect your motor normal operation, however the
thermal element can operate so that your relay has to be reset before putting it in service. FW version
5.54 and 5.80 properly address this behavior.
GE tracking number: 580-9