9.3.3 Function blockANSI09000281-1-en.vsdSAPFRC (81)V3P*BLOCKTRIPPICKUPRESTOREBLKDMAGNANSI09000281 V1 ENFigure 152: SAPFRC (81) function block9.3.4 SignalsTable 217:SAPFRC (81) Input signalsName Type Default DescriptionV3P GROUPSIGNAL- Three phase group signal for voltage inputsBLOCK BOOLEAN 0 Block of functionTable 218:SAPFRC (81) Output signalsName Type DescriptionTRIP BOOLEAN Operate/trip signal for frequency gradientPICKUP BOOLEAN Start/pick-up signal for frequency gradientRESTORE BOOLEAN Restore signal for load restoring purposesBLKDMAGN BOOLEAN Blocking indication due to low magnitude9.3.5 SettingsTable 219:SAPFRC (81) Group settings (basic)Name Values (Range) Unit Step Default DescriptionOperation DisabledEnabled- - Disabled Disable/Enable OperationPUFreqGrad -10.00 - 10.00 Hz/s 0.01 0.50 Frequency gradient pick up value, the signdefines directiontTrip 0.000 - 60.000 s 0.001 0.200 Operate time delay in positive / negativefrequency gradient modeRestoreFreq 45.00 - 65.00 Hz 0.01 49.90 Restore is enabled if frequency is above setfrequency valuetRestore 0.000 - 60.000 s 0.001 0.000 Restore time delaySection 9 1MRK 506 335-UUS AFrequency protection326Technical manual
