Function description IEC 61850 identification Function description IEC 61850 identificationPhase selection,quadrilateralcharacteristic withfixed angleFDPSPDIS Synchrocheck,energizing check, andsynchronizingSESRSYNFaulty phaseidentification with loadenchroachmentFMPSPDIS Circuit breakercondition monitoringSSCBRPhase selection,quadrilateralcharacteristic withsettable angleFRPSPDIS Insulation gasmonitoringSSIMGFrequency timeaccumulationprotectionFTAQFVR Insulation liquidmonitoringSSIMLFuse failuresupervisionFUFSPVC Stub protection STBPTOCGenerator differentialprotectionGENPDIF Transformerdifferential protection,two windingT2WPDIFDirectional OverpowerprotectionGOPPDOP Transformerdifferential protection,three windingT3WPDIFGenerator rotoroverload protectionGRPTTR Automatic voltagecontrol for tapchanger,single controlTR1ATCCGenerator statoroverload protectionGSPTTR Automatic voltagecontrol for tapchanger,parallel controlTR8ATCCDirectionalUnderpower protectionGUPPDUP Thermal overloadprotection, two timeconstantsTRPTTR1Ph High impedancedifferential protectionHZPDIF Two step undervoltageprotectionUV2PTUVLine differentialprotection, 3 CT sets,2-3 line endsL3CPDIF Voltage differentialprotectionVDCPTOVLine differentialprotection, 6 CT sets,3-5 line endsL6CPDIF Fuse failuresupervisionVDRFUFLow active power andpower factor protectionLAPPGAPC Voltage-restrainedtime overcurrentprotectionVRPVOCNegative sequenceovercurrent protectionLCNSPTOC Local accelerationlogicZCLCPSCHNegative sequenceovervoltage protectionLCNSPTOV Schemecommunication logicfor distance orovercurrent protectionZCPSCHThree phaseovercurrentLCP3PTOC Current reversal andweak-end infeed logicfor distance protectionZCRWPSCHTable continues on next page1MRK 505 393-UEN B Section 18Station communicationLine differential protection RED650 2.2 IEC 371Application manual
