The differential protection of delta/delta power transformers is achieved using which of the following connection of the current transformer

The differential protection of delta/delta power transformers is achieved using which of the following connection of current transformer:

1. Delta-Star connection
2. Star-Delta connection
3. Delta-Delta connection
4. Star-Star connection

Correct answer: 4. Star-Star connection

Explanation: For the differential protection of delta/delta power transformers the current transformer is connected in star-star configuration.

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