9.3.6.3 DesignIEC08000009_en_1.vsdRESTORESTART STARTTRIPStart&TripOutputLogicBLOCKFrequency100 msComparatorIf[StartFreqGrad<0ANDdf/dt < StartFreqGrad]OR[StartFreqGrad>0ANDdf/dt > StartFreqGrad]ThenSTARTComparatorf > RestoreFreqORDefinite Time DelaytTriptRestoreBLKDMAGNRate-of-Changeof FrequencyBLOCKfreqNotValidIEC08000009 V1 ENFigure 136: Schematic design of Rate-of-change frequency protection SAPFRC9.3.7 Technical dataTable 169:SAPFRC technical dataFunction Range or value AccuracyOperate value, start function (-10.00-10.00) Hz/s ± 10.0 mHz/sOperate value, restoreenable frequency(45.00 - 65.00) Hz ± 2.0 mHzTimers (0.000 - 60.000) s <130 msOperate time, start function At 50 Hz: 100 ms typicallyAt 60 Hz: 80 ms typically-1MRK 502 034-UEN - Section 9Frequency protection265Technical Manual
