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what are the uses of current transformer ?

1 Answer

Uses of current transformer are as follows :

A current transformer is use to measure Alternating current.

A current transformer is used in meters.

A current transformer is used in ammeters.

Current transformer is use with compensator.

Current transformer is use in power factor meters.

Current transformer is use in watthour meters.

Current transformer is use with relay.

Current transformer is use with circuit breaker.

Current transformer is use for overcurrent fault protection.

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Answer : The no load current in a transformer lags behind the applied voltage by an angle of about 75°.

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Answer : The secondary of a current transformer is always short-circuited under operating conditions because it avoids core saturation and high voltage induction.

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Answer : In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of less than 15A.

Description : About trnsformer

Answer : Acc to Ohms law V=IR but it is only applicable when our resistance R is constant, as in case of transformer we take impedence which is equivalent to resistance is not constant it varies with system parameters that why Ohms law not applicable in case of transformer

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