4–292 889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUALMONITORING CHAPTER 4: SETPOINTSFigure 4-120: Breaker Arcing Current logic diagramSETPOINTSBKR 1 ARCINGFUNCTION :AlarmLatched AlarmORANDLED: ALARM /LATCHED ALARMCommandANDSRLATCH # 1Set-DominantConfigurableFlexLogic OperandsBKR 1 Arc OPSETPOINTSDo Not Operate, OperateOUTPUT RELAY XCT Bank current IBCT Bank current ICANDSETPOINTSBKR 1 ARCINGBLOCK :Off = 0CT Bank current IADisabledANDCOMMANDCLEAR BKR 1 ARCINGCURRENT :YES = 1ORRESETIA² t IntegrateIB² t IntegrateIC² t IntegrateRUNRUNRUNSETPOINTSBKR 1 ARCINGDELAY:t delay0BKR 1 ARCINGINITIATION :Off = 0SETPOINTSOR 100ms0IA² cycleIB² cycleIC² cycleAdd to accumulatorSet all to 0Select highest valueBKR 1 ARCINGCURRENTSRECORDSSETPOINTSBKR 1 ARCINGALARM LEVEL :kA² cyc > Alarm LevelNO = 0Total I² cycle89$1.cdr
