VoltageSTART STARTTRIPStart&TripOutputLogicTime integratorDefinite Time DelayTimeDlyOperateTimeDlyResetComparatorU < IntBlockLevelBLOCKen05000735.vsdFrequency Comparatorf > StartFrequencyTRIPBLKDMAGNBLOCKORBLKTRIPIEC05000735 V1 ENFigure 83: Schematic design of overfrequency protection SAPTOF8.2.8 Technical dataTable 144:SAPTOF technical dataFunction Range or value AccuracyOperate value, start function (35.00-75.00) Hz ± 2.0 mHz atsymmetrical three-phase voltageReset ratio >0.999 -Operate time, start function At 50 Hz: 200 ms typically at fset -0.5 Hz to fset+0.5 HzAt 60 Hz: 170 ms typically at fset -0.5 Hz to fset+0.5 Hz-Reset time, start function At 50 and 60 Hz: 55 ms typically at fset +0.5 Hzto fset-0.5 Hz-Timer (0.000-60.000)s <250 ms8.3 Rate-of-change frequency protection SAPFRCSection 8 1MRK 511 287-UEN AFrequency protection186Technical manual
