Question 126Electricity & Electronics - 1st Asst/Chief

The correct answer is C) The start winding will burn out. If the starting winding of a split-phase induction motor fails to cut out once the motor reaches operating speed, the start winding will continue to carry the full current, causing it to overheat and eventually burn out. This is because the start winding is designed to provide additional torque during the starting phase, but it is not intended to run continuously at full load. Leaving the start winding engaged after the motor has reached speed will lead to its destruction. The other options are incorrect because: A) The motor will not overspeed, as the failure of the start winding will not affect the running winding's speed. B) The motor will not run at a reduced speed, as the failure of the start winding will not reduce the running winding's speed. D) There is no time delay mechanism that would stop the motor in this scenario.