Activities Manual For Programmable Logic Controllers
5th Edition
ISBN: 9781259682476
Author: Frank Petruzella
Publisher: Mcgraw-hill Higher Education (us)
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Chapter 6, Problem 6RQ
Explanation of Solution
a.
Schematic diagram of AC magnetic motor starter:
The schematic diagram for an across-the-line AC magnetic motor starter is given below:
Explanation:
- The above given schematic is of a three phase magnetic motor starter as AC signals mostly prefer three phase system...
Explanation of Solution
b.
i) Function of main contact M:
- The main contact M is placed in series with the motor.
- It is used to complete the path to the motor.
- It is a part of the power circuit and is built in such a way that it could handle full load current of motor.
ii) Function of control contact M:
- The control contact M is placed parallel to the start button.
- It is provided with an address similar to that of the starter coil M.
- It is used to keep continuity in path from left end of the rail to starter coil M, even though the start button is released.
- It is more than enough to handle small amount of current that is needed to energize the coil.
iii) Function of starter coil M:
- The starter coil M is placed in series to the start button...
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Chapter 6 Solutions
Activities Manual For Programmable Logic Controllers
Ch. 6 - Prob. 1RQCh. 6 - Prob. 2RQCh. 6 - Prob. 3RQCh. 6 - Prob. 4RQCh. 6 - Prob. 5RQCh. 6 - Prob. 6RQCh. 6 - Prob. 7RQCh. 6 - Prob. 8RQCh. 6 - What do the abbreviations NO and NC represent when...Ch. 6 - Prob. 10RQ
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