16.5.3 Setting guidelines M15292-3 v2Set the system rated frequency. Refer to section "Signal matrix for analog inputs SMAI" fordescription on frequency tracking.16.6 Summation block 3 phase 3PHSUM SEMOD55968-1 v216.6.1 Application SEMOD56004-4 v3The analog summation block 3PHSUM function block is used in order to get the sum of twosets of 3 phase analog signals (of the same type) for those IED functions that might need it.16.6.2 Setting guidelines SEMOD56006-4 v7The summation block receives the three-phase signals from SMAI blocks. The summation blockhas several settings.SummationType: Summation type (Group 1 + Group 2,Group 1 - Group 2,Group 2 - Group 1 or–(Group 1 + Group 2)).DFTReference: The reference DFT block (InternalDFT Ref,DFTRefGrp1 orExternal DFT ref) .DFTRefGrp1: This setting means use own internal adaptive DFT reference ( this setting makestheSUM3PH self DFT adaptive, that is, it will use the measured frequency for the summationsignal to adapt DFT).InternalDFTRef: Gives fixed window DFT (to nominal system frequency).ExternalDFTRef: This setting means that the DFT samples-per-cycle (adaptive DFT) will becontrolled by SMAI1 SPFCOUT.FreqMeasMinVal: The minimum value of the voltage for which the frequency is calculated,expressed as percent ofUBasebase voltage setting (for each instance x).GlobalBaseSel: Selects the global base value group used by the function to define (IBase),(UBase) and (SBase).16.7 Global base values GBASVAL GUID-2FDB0A2C-10FE-4954-B6E4-9DA2EEEF1668 v116.7.1 IdentificationGUID-0D5405BE-E669-44C8-A208-3A4C86D39115 v3Function description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberGlobal base values GBASVAL - -Section 16 1MRK 505 355-UEN ABasic IED functions248Application manual
