6.1.2.4 SettingsTable 24:T3WPDIF (87T) Group settings (basic)Name Values (Range) Unit Step Default DescriptionOperation DisabledEnabled- - Disabled Operation Disable / EnableIdMin 0.10 - 0.60 IB 0.01 0.30 Section 1 sensitivity current, usually W1currentEndSection1 0.20 - 1.50 IB 0.01 1.25 End of section 1, multiple of W1 rated currentEndSection2 1.00 - 10.00 IB 0.01 3.00 End of section 2, multiple of W1 rated currentSlopeSection2 10.0 - 50.0 % 0.1 40.0 Slope in section 2 of operate-restraincharacteristicsSlopeSection3 30.0 - 100.0 % 0.1 80.0 Slope in section 3 of operate-restraincharacteristicsIdUnre 1.00 - 50.00 IB 0.01 10.00 Unrestrained protection limit, multiple of W1rated currentI2/I1Ratio 5.0 - 100.0 % 0.1 15.0 Maximum ratio of 2nd harmonic tofundamental harmonic differential currentI5/I1Ratio 5.0 - 100.0 % 0.1 25.0 Maximum ratio of 5th harmonic tofundamental harmonic differential currentCrossBlockEn DisabledEnabled- - Enabled Operation Off/On for cross-block logicbetween phasesNegSeqDiffEn DisabledEnabled- - Enabled Operation Off/On for negative sequencedifferential functionIMinNegSeq 0.02 - 0.20 IB 0.01 0.04 Minimum negative sequence currentNegSeqROA 30.0 - 90.0 Deg 0.1 60.0 Operate angle for internal/external negativesequence fault discriminatorSOTFMode DisabledEnabled- - Enabled Operation mode for switch onto fault functionIDiffAlarm 0.05 - 1.00 IB 0.01 0.20 Differential current alarm, multiple of basecurrent, usually W1 currenttAlarmDelay 0.000 - 60.000 s 0.001 10.000 Time delay for differential current alarmTable 25:T3WPDIF (87T) Non group settings (basic)Name Values (Range) Unit Step Default DescriptionGlobalBaseSelW1 1 - 6 - 1 1 Selection of one of the Global Base Valuegroups, winding 1GlobalBaseSelW2 1 - 6 - 1 1 Selection of one of the Global Base Valuegroups, winding 2GlobalBaseSelW3 1 - 6 - 1 1 Selection of one of the Global Base Valuegroups, winding 3ConnectTypeW1 WYE (Y)Delta (D)- - WYE (Y) Connection type of winding 1: Y-wye or D-deltaTable continues on next pageSection 6 1MRK 502 043-UUS BDifferential protection80Technical Manual
