Which risk profile arises when operating a three-phase distribution transformer with a significantly unbalanced load?

💡 Explanation

When a three-phase distribution transformer operates with a significantly unbalanced load, unequal currents flow through each phase, causing increased core saturation because the magnetic fluxes no longer equally cancel each other, thus producing harmonic distortion. Therefore, increased core saturation and harmonic distortion occur, rather than the other options which arise from unrelated mechanisms.

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