Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Question
Chapter 3, Problem 2RQ
To determine
The action that restarts the motor when the motor is tripped due to over load.
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For the circuit shown, give the sequence of operation of cylinders 1 and 2 when the pump
is turned on.
Assume both cylinders are initially fully retracted.
CYLINDER 1
CYLINDER 2
U
O Cylinder 2 extends, cylinder 1 extends. Cylinder 2 retracts, cylinder 1 retracts. Cycle stops..
O Cylinder 1 extends, cylinder 2 extends. Cylinder 1 retracts, cylinder 2 retracts. Cycle stops.
O Cylinder 2 extends, cylinder 1 extends. Cylinder 2 retracts, cylinder 1 retracts. Cycle repeats.
O Cylinder 1 extends, cylinder 2 extends. Cylinder 1 retracts, cylinder 2 retracts. Cycle repeats.
Chapter 3 Solutions
Understanding Motor Controls
Ch. 3 - A manual motor starter controls a single phase 120...Ch. 3 - Prob. 2RQCh. 3 - Prob. 3RQCh. 3 - A push button manual starter has tripped on...Ch. 3 - What is meant by the term line voltage on some...Ch. 3 - Explain the difference between manual motor...Ch. 3 - Prob. 7RQCh. 3 - Prob. 8RQCh. 3 - Refer to the circuit shown in Figure 310. When...Ch. 3 - Prob. 10RQ
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- What is the difference between a motor starter and a contactor?arrow_forwardRefer to the schematic diagram in Figure 318. Assume that the motor is not running. When the third speed push button is pressed, the motor starts in its lowest speed. After a delay of 3 seconds, the motor accelerates to second speed and 3 seconds later to third speed. After a period of about 1 minute, the fourth speed push button is pressed, but the motor does not accelerate to fourth speed. Which of the following could cause this problem? a. Control relay CR2 coil is open. b. S2 contactor coil is open. c. CR3 coil is shorted. d. S3 contactor coil is open.arrow_forwardWhat are the disadvantages of low-speed, directly coupled induction motors?arrow_forward
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