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← TechnologyWhich consequence occurs when one phase conductor breaks in a three-phase induction motor under load?
A)Reduced torque with increased current✓
B)Balanced operation at lower efficiency
C)Full speed operation with audible hum
D)Complete motor shutdown without damage
💡 Explanation
When a phase conductor breaks, single-phasing occurs because the motor operates on only two phases, reducing torque capacity while drawing significantly increased current on the remaining phases, producing an unbalanced magnetic field. Therefore, reduced torque and increased current result, rather than balanced operation or complete shutdown, which would require different fault conditions.
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