Which risk significantly increases when three-phase transformer voltage imbalance exceeds design limits?

💡 Explanation

When voltage imbalance occurs, negative sequence currents circulate, because they induce counter-rotating magnetic fields in connected motors leading to hotspots and reduced lifespan from overheating. Therefore, motor overheating is more likely rather than saturation, conductor melting, or insulation breakdown, requiring specific overload or high-frequency conditions.

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