A large AC motor has a maximum ambient temperature rating of 40°C.
Which one of the following will occur if the motor is continuously operated at rated load with an ambient temperature of 50°C?
A. Accelerated embrittlement of the motor windings, leading to an open circuit within the motor windings.
B. Accelerated embrittlement of the motor windings, leading to a short circuit within the motor windings.
C. Accelerated breakdown of the motor winding insulation, leading to an open circuit within the motor windings.
D. Accelerated breakdown of the motor winding insulation, leading to a short circuit within the motor windings.
Show Answer
Answer: D
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