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Which outcome occurs when cyclic overload exceeds transformer's thermal limit?

A)Accelerated dielectric paper insulation degradation
B)Increased eddy current losses in core
C)Elevated winding circulating current imbalances
D)Harmonic resonance within transformer windings

💡 Explanation

Excessive overload induces hotspots inside the transformer; the Arrhenius Rate Equation governs insulation breakdown because increased temperature rapidly degrades cellulose paper's structure, therefore reducing its dielectric strength faster rather than causing imbalances or resonance effects.

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