7.1.6.2 Resistive reach in reverse direction M13877-15 v3To avoid load encroachment in reverse direction, the resistive reach is limited bysetting the parameter RLdOutRv for the outer boundary of the load encroachment zone.The distance to the inner resistive load boundary RLdInRv is determined by using thesetting parameter kLdRRv in equation 6.RLdInRv = kLdRRv·RLdOutRvEQUATION1187 V2 EN-US (Equation 6)where:kLdRRv is a settable multiplication factor less than 1From the setting parameter RLdOutRv and the calculated value RLdInRv, a distancebetween the inner and outer boundary, DRv, is calculated. This value is valid for Rdirection in second and third quadrant and for X direction in third and fourth quadrant.The inner resistive characteristic in the second quadrant outside the load encroachmentpart corresponds to the setting parameter R1FInRv for the inner boundary. The outerboundary is internally calculated as the sum of DRv+R1FInRv.The inner resistive characteristic in the third quadrant outside the load encroachmentzone consist of the sum of the settings R1FInRv and the line resistance R1LIn. Theangle of the tilted lines outside the load encroachment is the same as the tilted lines inthe first quadrant. The distance between the inner and outer boundary is the same as forthe load encroachment in reverse direction, that is DRv.7.1.6.3 Reactive reach in forward and reverse direction M13877-20 v3The inner characteristic for the reactive reach in forward direction correspond to thesetting parameter X1InFw and the outer boundary is defined as X1InFw + DFw,where:DFw =RLdOutFw -KLdRFw ·RLdOutFwThe inner characteristic for the reactive reach in reverse direction correspond to thesetting parameter X1InRv for the inner boundary and the outer boundary is defined asX1InRv + DRv.where:DRv =RLdOutRv - KLdRRv ·RLdOutRvSection 7 1MRK 511 408-UUS AImpedance protection150 Phasor measurement unit RES670 2.2 ANSITechnical manual
