UR Family Firmware 5.80 - Release Notes
3
E
C70 has been enhanced to always have three sets of voltage elements independently of the quantity
of voltage sources
Products: C70
Corrected firmware: 5.80
Description: Enhancements on the C70 allow three sets of voltage elements to be always available
regardless the number of voltage banks configured in the C70. The Voltage elements that have been
enhanced to always have three elements available are: Phase under-voltage “27P”, Auxiliary over-voltage
“59X”, Neutral Over-voltage “59N”, Negative sequence Over-voltage “59_2” This enhancement allows the
C70 to fit those applications where more than two voltage elements are required per a single voltage
source, for example 59N alarm settings, 59N low-level trip, and 59N High-level setting.
GE tracking number: 580-6
E
Thermal overcurrent curve “I2T type” has been enhanced with the addition of a new reset operand
Products: C70
Corrected firmware: 5.80
Description: The capacitor bank protection system C70 has a new operand for the I2T overcurrent curve.
The operand indicates the reset status of the I2T overcurrent curve (cooling portion of the thermal curve
or thermal memory). Since the new operand takes into account the thermal status, it can be used in a
permissive scheme to allow re-energizing a capacitor bank after tripping on an overload condition.
GE tracking number: 580-7
Feeder Protection Systems F35, F60
N Extended protection capabilities have been given to the F35 Multi Feeder Protection System through
the addition of Negative Sequence Overcurrent elements
Products: F35
Corrected firmware: 5.80
Description: New negative sequence overcurrent elements “50_2 and 51_2” have been added to the F35
protection functions. This enhancement enables the F35 multiple feeder protection system to better fit
protection schemes where early detection of negative sequence overcurrent condition are required.
GE tracking number: 580-8
Line Differential Systems L30, L60, L90
G
The Phase Comparison Element “87PC” has been modified to ensure the transient block pickup is
active only when the phase coincidence detector picks up
Products: L60
Corrected firmware: 5.80
Description: The L60 Phase Comparison Element “87PC” has been modified to ensure the “transient block
pickup delay timer” starts only after the 87PC pickup delay timer has expired. On previous firmware
versions, L60 users needed to increase the “transient block delay timer” (by adding the “87PC pickup delay
timer” value) to get an optimal timing, so users doing the upgrade to the latest firmware version do not
have to compensate this way.
GE tracking number: 580-9