Which protection outcome results when a three-phase induction motor experiences a single-phase power loss during operation?

💡 Explanation

When a three-phase motor loses one phase, negative sequence currents are induced in the rotor because the magnetic field becomes elliptical, leading to increased resistive losses concentrated in the windings, and causing rapid localized heating. Therefore winding overheating occurs, rather than immediate overcurrent, surge suppression, or harmonic filtering, which address different electrical faults.

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