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← TechnologyWhich protection outcome occurs in a three-phase induction motor when a single phasing condition develops?
A)Rapid torque oscillations and overheating✓
B)Balanced voltage drop across all phases
C)Reduced current draw protecting windings
D)Improved motor efficiency and power factor
💡 Explanation
When single phasing occurs, the motor attempts to deliver the same power with fewer phases; this causes increased current and torque pulsations in the remaining phases due to uneven magnetic field distribution leading to rapid torque oscillations and overheating. Therefore, motor overheating results, rather than voltage balance, reduced current, or efficiency gains, which rely on balanced phase currents.
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