Which outcome occurs when a three-phase distribution transformer experiences single-phasing condition on the primary side?

💡 Explanation

When single-phasing occurs, the transformer windings experience increased current in the remaining phases because the load is not evenly distributed, leading to hotspot formation and accelerated insulation degradation. Therefore winding overheating and burnout result, rather than increased efficiency, balanced voltage or harmonic reduction that requires balanced and stable operating conditions.

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