GE L60 Instruction Manual page 365

5 SETTINGS
As long as the operand indicated under this setting is asserted the trip action is delayed by
time. Typically this operand should combine reverse zone indications (such as zone 4 pickup) with a half-cycle
FAULTS
pickup delay, and two-cycle dropout delay. This setting should be used only in single-pole tripping applications, when
evolving faults are of importance, and slightly delayed operation on evolving faults could be traded for enhanced accu-
racy of single-pole tripping.
• TRIP DELAY ON EVOLV FAULTS: Use this setting in conjunction with the
cally this value is set around half a power system cycle. Use it only in single-pole tripping applications, when evolving
faults are of importance, and slightly delayed operation on evolving faults could be traded for enhanced accuracy of
single-pole tripping.
• BKR ΦA OPEN, BKR ΦB OPEN, and BKR ΦC OPEN: This settings are used to select an operand to indicates that
phase A, B, or C of the breaker is open, respectively.
GE Multilin L60 Line Phase Comparison System
5.6 CONTROL ELEMENTS
TRIP DELAY ON EVOLV
setting (see above). Typi-
REVERSE FAULT
5
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