What is Current Transformer accuracy class

IEC61869-2 / IEC60044-1 / IEEE/ANSI C57.13

IEC61869-2, Table 201

Limits of ratio error and phase displacement for measuring current transformers (classes from 0.1 to 1)

IEC61869-2, Table 202

Limits of ratio error and phase displacement for measuring current transformers (classes from 0.2S to 0.5S)

IEC60044-1, Table 11

Limits of current error and phase displacement for measuring current transformers (classes from 0.1 to 1)

IEC60044-1, Table 12

Limits of current error and phase displacement for measuring current transformers for special application

Accuracy classes according to IEEE/ANSI C57.13