4–318 889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUALMONITORING CHAPTER 4: SETPOINTSFigure 4-131: Harmonic Detection logic diagram894000A2.cdrLED: PICKUPSETPOINTBLOCK :Off=0ANDSETPOINTFUNCTION :DisabledAlarmLatched AlarmConfigurableORSETPOINTPICKUP :W1_HDF PICKUPRUNSETPOINTPICKUP DELAY :tPKP0W1 Harm Derat OPFlexLogic OperandsW1 Harm Derat PKPAND ANDCommandRESETORLED: ALARMSETPOINTMINIMUM OPERCURRENT :IA MINIMUMRUNSLATCHSet-DominantRPhase A Current (IA)Phase B Current (IB)Phase C Current (IC)Phase A HarmonicsPhase B HarmonicsPhase C HarmonicsIB MINIMUMIC MINIMUMSETPOINTOUTPUT RELAY XDo Not Operate , OperateW1 Current HarmonicsW1 Current InputCalculate HarmonicDerating Factor(W1_HDF )ANDPhase A HarmonicsPhase B HarmonicsPhase C HarmonicsW2 Current HarmonicsCalculate HarmonicDerating Factor(W2_HDF )Phase A HarmonicsPhase B HarmonicsPhase C HarmonicsW3 Current HarmonicsCalculate HarmonicDerating Factor(W3_HDF )Load Limit ReducedLED: LOAD-LIMITREDUCEDW2_HDF < 0.96W1_HDF < 0.96W3_HDF < 0.96OR
