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What is the difference between CT for protection and Ct for
metering?
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Answer Posted / p.raju
yes , There is difference between the protection ct and
metering CT in operating conditions
*The CT using for protection will have to carry the fault
currents which are 10 times the normal full load current
thats why it is designed at much bellow the saturation point
(knee)inorder to aviod saturation.
*The CT used for metering will have to carry only full load
current thats why it is designed near to knee point.
as per accuracy concern the metering Ct should be more
accurate under normal operating condition.....i.e under
normal operating condition the pretection CT accuracy not
imp..........
| Is This Answer Correct ? | 409 Yes | 15 No |
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