Table 560:IEC Inverse time characteristicsFunction Range or value AccuracyOperating characteristic:( )1= ×-æ öç ÷ç ÷è øPAt kIEQUATION1251-SMALL V1 ENI = Imeasured/Isetk = (0.05-999) in steps of 0.01 -IEC Normal Inverse A=0.14, P=0.02IEC Very inverse A=13.5, P=1.0IEC Inverse A=0.14, P=0.02IEC Extremely inverse A=80.0, P=2.0IEC Short time inverse A=0.05, P=0.04IEC Long time inverse A=120, P=1.0The parameter setting Characterist1 and 4/Reserved shall not be used,since this parameter setting is for future use and not implemented yet.Table 561:RI and RD type inverse time characteristicsFunction Range or value AccuracyRI type inverse characteristic10.2360.339= ×-t kIEQUATION1137-SMALL V1 ENI = Imeasured/Isetk = (0.05-999) in steps of 0.01RD type logarithmic inverse characteristic5.8 1.35= - ×æ öç ÷è øt IIn kEQUATION1138-SMALL V1 ENI = Imeasured/Isetk = (0.05-999) in steps of 0.01Section 21 1MRK 504 135-UEN ATime inverse characteristics632Technical manual
