Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Textbook Question
Chapter 12, Problem 1RQ
What is the purpose of sequence control?
Expert Solution & Answer
To determine
Identify the purpose of sequence control.
Explanation of Solution
The purpose of sequence control is to maintain the predetermined order at which the motors are forced to start or stop. One motor cannot start unit its predecessor is in operation.
Machines that have high pressure pump operation like the hydraulic press or systems that requires a blower to be in operation before stating the compressor like the air-conditioning systems use the sequence control.
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For the system shown in Fig. 6.7, the following data are applicable
P1 = 7 bar
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Solve for P2 in units of bars.
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OH
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☐
38 mm (ID)
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using the three moment theorem please find the moments about B, C and D
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× 103 m³/s
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