GE Multilin L60 Line Phase Comparison System 5-2375 SETTINGS 5.6 CONTROL ELEMENTS5As long as the operand indicated under this setting is asserted the trip action is delayed by TRIP DELAY ON EVOLVFAULTS time. Typically this operand should combine reverse zone indications (such as zone 4 pickup) with a half-cyclepickup delay, and two-cycle dropout delay. This setting should be used only in single-pole tripping applications, whenevolving 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 REVERSE FAULT setting (see above). Typi-cally this value is set around half a power system cycle. Use it only in single-pole tripping applications, when evolvingfaults are of importance, and slightly delayed operation on evolving faults could be traded for enhanced accuracy ofsingle-pole tripping.• BKR ΦA OPEN, BKR ΦB OPEN, and BKR ΦC OPEN: This settings are used to select an operand to indicates thatphase A, B, or C of the breaker is open, respectively.
