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Which condition requires transformer differential protection tripping breakers?

A)Internal winding fault currents
B)High ambient operating temperature
C)Rising core excitation voltage
D)Frequent grid frequency variations

💡 Explanation

Transformer differential protection trips breakers to isolate internal faults because it detects imbalances between currents entering and exiting the transformer windings. Therefore, breaker activation prevents escalating damage, rather than stemming environmental problems or grid fluctuations.

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