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← TechnologyWhich outcome occurs when a three-phase motor trips a molded case circuit breaker due to overload?
A)Reduced motor starting torque capability✓
B)Increased motor efficiency at lower load
C)Instantaneous motor reversal and backspin
D)Elimination of harmonics on the supply lines
💡 Explanation
When a motor trips a breaker due to overload, thermal or magnetic protection mechanisms activate because excessive current causes overheating or high magnetic fields, reducing the motor's ability to deliver starting torque upon restart. Therefore, reduced starting torque occurs, rather than efficiency increase, reversal, or harmonic elimination, which require different conditions.
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