Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Question
Chapter 27, Problem 5SQ
To determine
What will happen while the stop button is pressed and then the start button is pressed immediately, if the motoring is running?
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c) Based on Figure 3 (c), a basic DOL starter induction motor at a power station is
experiencing run-time error and unable to start, based on your understanding,
interpret the sequence of troubleshooting shall be carried out to identify the root
cause of the abnormalities.
3P
1P
MCB
MCB
STOP
K1
START
MOTOR
Figure 3 (c)
Assume all of the timers are set for a 3 second delay. When the start button is pressed, nothing happens. None of the motors start. Which of the following could NOT cause this problem.
a
Overload contact OL1 is open
b
1CR relay coil is open
c
2CR relay coil is open
d
The stop button is open
Chapter 27 Solutions
Electric Motor Control
Ch. 27 - Why is it desirable to remove the autotransformers...Ch. 27 - What is meant by an open transition from start to...Ch. 27 - Which of the following applies to an...Ch. 27 - How are reduced voltages obtained from...Ch. 27 - Prob. 5SQCh. 27 - What is a disadvantage of starting with...Ch. 27 - What is one advantage of using an autotransformer...
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