Which outcome occurs when a three-phase power transformer experiences core saturation during transient overvoltage events?

💡 Explanation

When transformer core saturates under overvoltage, the magnetizing current becomes highly non-sinusoidal because the core's permeability drops drastically, leading to increased harmonic distortion. Therefore, distorted output results, rather than efficiency loss, partial discharge, or insulation aging, which arise from other separate mechanisms.

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