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Which outcome occurs when a three-phase power transformer experiences a core lamination short circuit?

A)Localized core hot spots and insulation breakdown
B)System-wide voltage sag due to reduced impedance
C)Unbalanced current distribution in the winding
D)Resonance oscillation caused by harmonic distortion

💡 Explanation

When core lamination insulation fails, eddy currents increase because the laminations are no longer effectively isolating each other, leading to concentrated heating and insulation damage. Therefore,localized hot spots result, rather than system sag, current imbalance, or resonance, all of which demand different root causes.

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