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Electric Motor Control

10th Edition
Herman
Publisher: CENGAGE L
ISBN: 9781133702818

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BuyFindarrow_forward

Electric Motor Control

10th Edition
Herman
Publisher: CENGAGE L
ISBN: 9781133702818
Chapter 3, Problem 21SQ
Textbook Problem
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Select the best answer for each of the following.

Motors may burn out because of

a. overloads.

b. high ambient temperatures.

c. poor ventilation.

d. all of the above.

To determine

Choose the best option that represents the causes for the burn out of the motor.

Explanation of Solution

Discussion:

The probable causes for the burn out of the motor are as follows.

  • Motor burns out when the current (load) exceeds its normal range.
  • Motor burns out due to the high temperature effect, which are caused by overcurrents and motor losses.
  • Motor burns out due to the poor ventilation. If the ventilation is not enough to reduce the heating effect due to the overcurrents and losses, the motor may be burned out...

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