99000530.vsdYtValue Reported(1st)Y1ValueReportedA1Y2ValueReportedY3Y4A ValueReportedA2Y5A3A4 A5 A7A6ValueReportedA2 >=pre-set valueA1 >=pre-set valueA >=pre-set valueA3 + A4 + A5 + A6 + A7 >=pre-set valueIEC99000530 V1 ENFigure 244: Reporting with integral dead-band supervision14.1.8.2 Measurements CVMMXNMode of operationThe measurement function must be connected to three-phase current and three-phasevoltage input in the configuration tool (group signals), but it is capable to measure andcalculate above mentioned quantities in nine different ways depending on theavailable VT inputs connected to the IED. The end user can freely select by aparameter setting, which one of the nine available measuring modes shall be usedwithin the function. Available options are summarized in the following table:Set value forparameter“Mode”Formula used for complex, three-phase power calculationFormula used for voltage andcurrent magnitude calculationComment1 L1, L2, L3 * * *1 1 2 2 3 3= × + × + ×L L L L L LS U I U I U IEQUATION1385 V1 EN1 2 31 2 3( ) / 3( ) / 3= + += + +L L LL L LU U U UI I I IEQUATION1386 V1 ENUsed whenthree phase-to-earthvoltages areavailable2 Arone * *1 2 1 2 3 3= × - ×L L L L L LS U I U IEQUATION1387 V1 EN (Equation 95)1 2 2 31 3( ) / 2( ) / 2= += +L L L LL LU U UI I IEQUATION1388 V1 EN (Equation 96)Used whenthree twophase-to-phasevoltages areavailable3 PosSeq *3= × ×PosSeq PosSeqS U IEQUATION1389 V1 EN (Equation 97)3= ×=PosSeqPosSeqU UI IEQUATION1390 V1 EN (Equation 98)Used whenonlysymmetricalthree phasepower shallbe measuredTable continues on next pageSection 14 1MRK 502 048-UEN AMonitoring494Technical manual
