12.1.7 Technical dataTable 336:ZCPSCH (85) technical dataFunction Range or value AccuracyScheme type DisabledIntertripPermissive URPermissive ORBlockingDeltaBlocking-Operate voltage, Delta V (0–100)% of VBase ± 5.0% of ΔVOperate current, Delta I (0–200)% of IBase ± 5.0% of ΔIOperate zero sequence voltage,Delta 3V0(0–100)% of VBase ± 10.0% of Δ3V0Operate zero sequence current,Delta 3I0(0–200)% of IBase ± 10.0% of Δ3I0Co-ordination time for blockingcommunication scheme(0.000-60.000) s ± 0.5% ± 10 msMinimum duration of a carrier sendsignal(0.000-60.000) s ± 0.5% ± 10 msSecurity timer for loss of guard signaldetection(0.000-60.000) s ± 0.5% ± 10 msOperation mode of unblocking logic DisabledNoRestartRestart-12.2 Current reversal and WEI logic for distance protection3-phase ZCRWPSCH (85)12.2.1 IdentificationFunction description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberCurrent reversal and WEI logic fordistance protection 3-phaseZCRWPSCH - 8512.2.2 FunctionalityThe current reversal function is used to prevent unwanted operations due to currentreversal when using permissive overreach or unblock protection or unblocking schemesin application with parallel lines.Section 12 1MRK 506 335-UUS AScheme communication502Technical manual
