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In a star delta transmission system the CTs used in differential protection will be connected in:
1. Star connection on both sides of transformer
2. Star connection on star side and delta connection on delta side
3. Delta connection on both sides of transformer
4. Delta connection on star side and star connection on delta side.

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Correct Answer - Option 4 : Delta connection on star side and star connection on delta side.

In a star delta transmission system the CTs used in differential protection will be connected in delta connection on star side and star connection on delta side.

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