Table 676:Inverse time characteristics for residual overvoltage protectionFunction Range or value AccuracyType A curve:= - >>æ öç ÷è øt kU UUEQUATION1436-SMALL V1 EN-USU> = UsetU = Umeasuredk = (0.05-1.10) in steps of0.01±5.0% or ±45 mswhichever isgreaterType B curve:2.048032 0.5= ⋅− >⋅ −0.035+> t kU UUEQUATION1437-SMALL V2 EN-USk = (0.05-1.10) in steps of0.01Type C curve: 3.048032 0.5= ⋅⋅ −− >0.035+> t kU UUEQUATION1438-SMALL V2 EN-USk = (0.05-1.10) in steps of0.01Programmable curve:×= +- >× ->æ öç ÷è øPk At DU UB CUEQUATION1439-SMALL V1 EN-USk = (0.05-1.10) in steps of0.01A = (0.005-200.000) insteps of 0.001B = (0.50-100.00) insteps of 0.01C = (0.0-1.0) in steps of0.1D = (0.000-60.000) insteps of 0.001P = (0.000-3.000) insteps of 0.001Section 25 1MRK 505 394-UEN AInverse time characteristics888 Line differential protection RED650 2.2 IECTechnical manual
