Answer / ganesh

CT's are used in Electrical circuits for different
purposes. For example measurement, protection. In
protection also if it is busbar or differntial protection
the sensitivity of the CT is very important. According to
the purpose it is going to serve the accuracy class of the
CT differs. For measurement it is enough to have low
accuracy class say 10P10 . If it is for Differential or
busbar protection it will be class x which is very accurate
it measurement

Answer / vimal dixit

Measuring C.T.s - 0.2% class
Protection C.T.s - 5p10 class
AS in measuring cts accuracy of measurement is required.
While in protection cts only mesurement is required.

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