• Logical 1 on functional input BLOCK inhibits the output START signalinstantaneously.• The INHIBIT internal signal is activated, if the power swing has been detectedand the measured impedance remains within its operate characteristic for thetime, which is longer than the time delay set on tR2 timer. It is possible todisable this condition by connecting the logical 1 signal to the BLKI01functional input.• The INHIBIT internal signal is activated after the time delay, set on tR1 timer,if an earth-fault appears during the power swing (input IOCHECK is high) andthe power swing has been detected before the earth-fault (activation of thesignal I0CHECK). It is possible to disable this condition by connecting thelogical 1 signal to the BLKI02 functional input.• The INHIBIT logical signals becomes logical 1, if the functional inputI0CHECK appears within the time delay, set on tEF timer and the impedancehas been seen within the outer characteristic of ZMRPSB operatecharacteristic in all three phases. This function prevents the operation ofZMRPSB function in cases, when the circuit breaker closes onto persistentsingle-phase fault after single-phase autoreclosing dead time, if the initialsingle-phase fault and single-phase opening of the circuit breaker causes thepower swing in the remaining two phases.7.2.7 Technical dataM16036-1 v10Table 54:ZMRPSB technical dataFunction Range or value AccuracyReactive reach (0.10-3000.00) W/phase ±2.0% static accuracyConditions:Voltage range: (0.1-1.1) x UrCurrent range: (0.5-30) x IrAngle: at 0 degrees and 85degreesResistive reach (0.10–1000.00) W/loopPower swing detection operatetime(0.000-60.000) s ±0.2% or ±10 ms whicheveris greaterSecond swing reclaim operatetime(0.000-60.000) s ±0.2% or ±20 ms whicheveris greaterMinimum operate current (5-30)% of IBase ±1.0% of Ir7.3 Automatic switch onto fault logic ZCVPSOF SEMOD153633-1 v37.3.1 IdentificationSEMOD155890-2 v4Function description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberAutomatic switch onto fault logic ZCVPSOF - -Section 7 1MRK 505 394-UEN AImpedance protection154 Line differential protection RED650 2.2 IECTechnical manual
