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what is CT class? depending upon which it is classified?
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Answer Posted / ktd
CT class is basically indicating the purpose and accuracy
of the CT. In brief
class 1.0 indicated +/-1% variation in the Current measured
by the CT. ex. a CT with ratio 100/1 with Cl. 1, measuring
100A in the conductor can possibly show 1.01A or .99 A
deviating 1% max from the actual reading.
class 5P20 indicates a protection class CT which can
withstand 20 times the rated current(occuring due to faults)
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