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← TechnologyWhich outcome occurs when one phase is lost in a three-phase induction motor driving a high-inertia load?
A)Reduced speed and potential overheating✓
B)Instantaneous torque increase and acceleration
C)Balanced current increase in remaining phases
D)Voltage spike across the motor terminals
💡 Explanation
When one phase is lost, the motor operates on single phasing because the balanced three-phase magnetic field collapses, leading to pulsating torque which cannot maintain synchronous speed under load causing increased current and overheating. Therefore, reduced speed and potential overheating usually result, rather than increased torque,balanced currents, or a voltage spike, which necessitate different electrical events.
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