IEC TR 61869-100:2017/COR1:2023 - 1 - IEC2023 INTERNATIONAL ELECTROTECHNICAL COMMISSION IEC 61869-100 Edition1.0 2017-01 INSTRUMENT TRANSFORMERS - Part 100: Guidance for application of current transformers in power system protection CORRIGENDUM 1 6.1.3.3 Range 1: 0 ≤ t'al ≤ ttf,max Replace the following first and second formulae and the key: "At this point in time, the following condition is fulfilled: sin(o ttfmax +y- )=-1 This equation is equivalent to 3元/2-+ (19) ttf,max w where = arctan (wT,)." with the following: "At this point in time, the following condition is fulfilled: sin (o tf,max + - p) = -1 IEC TR 61869-100:2017/COR1:2023 - 2 - IEC2023 This equation is equivalent to 3元/2-+ (19) = xew'n, where β = arctan (Tp)." IEC TR 61869-100:2017/COR1:2023 - 2 - IEC2023 This equation is equivalent to 3元/2-+ (19) = xew'n, where β = arctan (Tp)."