RjXArgLdArgLdRLdOutFwRLdInFwR1FInFwR1FInRvRLdInRvRLdOutRvX1InFwX1OutFw ZL R1LInX1InRvX1OutRvIEC09000222_1_en.vsdDRvDRvDRvDRvDRvDFwDFwDFwDFwDFwDFwjjjIEC09000222 V1 ENFigure 51: Operating characteristic for ZMRPSB function (setting parameters initalic)The impedance measurement within ZMRPSB function is performed by solvingequation 30 and equation 31 (n = 1, 2, 3 for each corresponding phase L1, L2 and L3).RsetRe nnIULL£÷÷øöççèæEQUATION1183 V2 EN (Equation 30)Im nnXsetIULL£÷÷øöççèæEQUATION1184 V2 EN (Equation 31)The Rset and Xset are R and X boundaries.7.1.6.1 Resistive reach in forward directionTo avoid load encroachment, the resistive reach is limited in forward direction bysetting the parameter RLdOutFw which is the outer resistive load boundary valuewhile the inner resistive boundary is calculated according to equation 32.Section 7 1MRK 504 135-UEN AImpedance protection126Technical manual
