Consider the following statements regarding the causes of

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Consider the following statements regarding the causes of error in current transformers:
1. Some exciting mmf is required by the primary winding to produce a flux.
2. The flux density in the core is not a linear function of the magnetising force.
3. There is some magnetic leakage in the secondary winding.
4. There is significant power consumption in the metering current. Of these statements:

1. 1 and 2 are correct
2. 1, 2 and 3 are correct
3. 2 and 4 are correct
4. 1, 3 and 4 are correct

Correct Option: D

Causes of error in current transformers
● Some exciting mmf is required by the primary winding to produce a flux.
● There is some magnetic leakage in the secondary winding which produces large error in current transformer.
● There is significant power consumption in the metering current.