13.1.7 Technical dataM16038-1 v14Table 229:ZCPSCH technical dataFunction Range or value AccuracyScheme type OffIntertripPermissive URPermissive ORBlockingDeltaBlocking-Operate voltage, Delta U (0–100)% of UBase ±5.0% of ΔUOperate current, Delta I (0–200)% of IBase ±5.0% of ΔIOperate zero sequence voltage,Delta 3U0(0–100)% of UBase ±10.0% of Δ3U0Operate zero sequence current,Delta 3I0(0–200)% of IBase ±10.0% of Δ3I0Co-ordination time for blockingcommunication scheme(0.000-60.000) s ±0.2% or ±15 mswhichever is greaterMinimum duration of a carrier sendsignal(0.000-60.000) s ±0.2% or ±45 mswhichever is greaterSecurity timer for loss of guardsignal detection(0.000-60.000) s ±0.2% or ±15 mswhichever is greaterOperation mode of unblocking logic OffNoRestartRestart-13.2 Current reversal and Weak-end infeed logic fordistance protection 3-phase ZCRWPSCH IP15751-1 v413.2.1 IdentificationM15073-1 v5Function description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberCurrent reversal and weak-end infeedlogic for distance protection 3-phaseZCRWPSCH - 8513.2.2 Functionality M13896-3 v15The ZCRWPSCH function provides the current reversal and weak end infeed logicfunctions that supplement the standard scheme communication logic. It is notsuitable for standalone use as it requires inputs from the distance protectionfunctions and the scheme communications function included within the terminal.On detection of a current reversal, the current reversal logic provides an output toblock the sending of the teleprotection signal to the remote end, and to block the1MRK 505 394-UEN A Section 13Scheme communicationLine differential protection RED650 2.2 IEC 409Technical manual
