6.1.4 SignalsPID-3701-INPUTSIGNALS v4Table 32:LT3CPDIF Input signalsName Type Default DescriptionI3P1 GROUPSIGNAL- Three phase current grp1 samples and DFTvaluesI3P2 GROUPSIGNAL- Three phase current grp2 samples and DFTvaluesI3P3 GROUPSIGNAL- Three phase current grp3 samples and DFTvaluesPID-3701-OUTPUTSIGNALS v4Table 33:LT3CPDIF Output signalsName Type DescriptionTRIP BOOLEAN Common, main, trip output signalTRL1 BOOLEAN Trip signal from phase L1TRL2 BOOLEAN Trip signal from phase L2TRL3 BOOLEAN Trip signal from phase L3STARTRES BOOLEAN Start of restrained differential protectionSTARTUNR BOOLEAN Start of unrestrained differential protectionSTARTENH BOOLEAN Start of enhanced restrained differentialprotectionSTART BOOLEAN Common, main, start output signalSTL1 BOOLEAN Start signal from phase L1STL2 BOOLEAN Start signal from phase L2STL3 BOOLEAN Start signal from phase L3INTFAULT BOOLEAN Internal fault has been detectedEXTFAULT BOOLEAN External fault has been detectedBLK2H BOOLEAN Common block signal, due to 2nd harmonicBLK2HL1 BOOLEAN Block signal due to 2nd harmonic, phase L1BLK2HL2 BOOLEAN Block signal due to 2nd harmonic, phase L2BLK2HL3 BOOLEAN Block signal due to 2nd harmonic, phase L3BLK5H BOOLEAN Common block signal, due to 5-th harmonicBLK5HL1 BOOLEAN Block signal due to 5th harmonic, phase L1BLK5HL2 BOOLEAN Block signal due to 5th harmonic, phase L2BLK5HL3 BOOLEAN Block signal due to 5th harmonic, phase L3ALARM BOOLEAN Alarm for sustained differential currentOPENCT BOOLEAN An open CT was detectedOPENCTAL BOOLEAN Open CT Alarm output signal. Issued after adelay ...IDL1 REAL Instantaneous differential current, phase L1IDL2 REAL Instantaneous differential current, phase L2Table continues on next pageSection 6 1MRK 505 394-UEN ADifferential protection88 Line differential protection RED650 2.2 IECTechnical manual
