5-144 L60 Line Phase Comparison System GE Multilin5.5 GROUPED ELEMENTS 5 SETTINGS5• OPEN BREAKER KEYING RST DELAY: Delays the reset of open breaker keying to override disagreement betweenmain and auxiliary contacts of the breaker or any other operating conditions.• WEAK-INFEED KEYING: This setting assigns a sensitive phase-current element for weak-infeed keying control. Itshould be normally picked up with a minimum line load current. An instantaneous overcurrent element or a group ofovercurrent elements are suitable for this purpose.• WEAK-INFEED SUPV: This setting selects a weak-infeed supervising element from FlexLogic operands. An under-voltage element, auxiliary contacts of breakers indicating close position, or other elements can be useful for no-currentsupervision.• WEAK-INFEED PICKUP DELAY: This setting delays operation of weak-infeed keying during some transient condi-tions (such as breaker reclosure, etc.).• WEAK-INFEED RESET DELAY: The weak-infeed keying function incorporates a default 35 ms reset delay to assurereset coordination with the FDH trip-level fault detector at the remote terminal during fault clearing. The default resettime can be changed according to local conditions.Figure 5–56: OPEN BREAKER ECHO SCHEME LOGICSETTINGSETTINGSETTINGSETTINGSETTINGSETTINGSETTINGSETTINGFLEXLOGIC OPERANDOPEN BREAKER KEYING:BRK 1 CONTACT SUPV:BRK 2 CONTACT SUPV:OPEN BRK KEYING PKPDELAY: 00.000SWEEK-INFEEDPICKUP DELAY:OPEN BRK KEYING RSTDELAY: 00.000SWEEK-INFEEDRESET DELAY:WEAK-INFEEDKEYING:WEAK - INFEEDSUPV:BRK 1AUX CONTACT :Off=0SETTINGOff=0Enabled=1Off=0Disabled=0Off=0Off=0Off=0ORANDANDANDANDAND827075A9.CDR87PC BKR ECHO PKPBRK 2AUX CONTACT:t PKPt RST=35mst PKPt RST
