Which risk increases in a three-phase induction motor operating with a sustained voltage imbalance between phases?

💡 Explanation

When voltage is imbalanced, excessive negative sequence currents circulate in the stator because induced reverse torque overheats particular winding sections, resulting in localized hot spots. Therefore winding hotspots result, rather than bar cracking, bearing failure, or lamination loosening which derive from separable mechanical imbalances.

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