4–236 889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUALPROTECTION CHAPTER 4: SETPOINTSFigure 4-89: Neutral Overvoltage Protection logic diagramSETPOINTS3_V0SETPOINTFUNCTION:DisabledTripPICKUP:ANDOperate Output Relay 1 (TRIP)LED: PICKUPLED: TRIPAlarmORORANDLatched AlarmANDSETPOINTSBLOCK :Off = 0LED: ALARM /LATCHED ALARMRESETCommandANDSRLATCHConfigurableFlexLogic OperandsNeutral OV 1 OP:Neutral OV 1 PKP:SETPOINTSPICK-UP DELAY:DROP-OUT DELAY:t PKPt RSTVan > 0.85 x VTVbn > 0.85 x VTVcn > 0.85 x VTOR3_Vo > PICKUPRUNCURVE:SETPOINTSDo Not Operate, OperateOUTPUT RELAYS 3 to 7Phase A Voltage (Va)Phase B Voltage (Vb)Phase C Voltage (Vc)Phase Voltages SETPOINTSSIGNAL INPUT:Ph VT Bank 1-J2USED ONLY IN 850894050A2.cdr
