aba>bBLOCKANDIOPExtract secondharmonic currentcomponentExtractfundamentalcurrent component X2ndHarmStababa>baba>b0.07*IBaseIEC13000015-1-en.vsd2NDHARMDUseStartValueIN1>IN2>IN3>IN4>aba>b|IOP|tt=70ms OR ANDBlkParTransf=Onq-1OR 2ndH_BLOCK_IntIEC13000015 V1 ENFigure 75: Second harmonic blocking8.4.9 Technical dataTable 90:EF4PTOC technical dataFunction Range or value AccuracyOperate current (1-2500)% oflBase ± 1.0% of Ir at I < Ir± 1.0% of I at I > IrReset ratio > 95% -Operate current for directionalcomparison, Zero sequence(1–100)% oflBase ± 2.0% of IrOperate current for directionalcomparison, Negative sequence(1–100)% oflBase ± 2.0% of IrMin. operating current (1-10000)% oflBase ± 1.0% of Ir at I < Ir± 1.0% of I at I >IrMinimum operate time for inversecharacteristics(0.000-60.000) s ± 0.5% ± 25 msTimers (0.000-60.000) s ± 0.5% ±25 msInverse characteristics, see table559, table 560 and table 56115 curve types 1) ANSI/IEEE C37.112IEC 60255–151±3% or ±40 ms0.10 ≤ k ≤ 3.001.5 x Iset ≤ I ≤ 20 x IsetTable continues on next page1MRK 504 135-UEN A Section 8Current protection171Technical manual