Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Textbook Question
Chapter 4, Problem 9SQ
The symbol shown is a
a. double-acting push button.
b. two-position selector switch.
c. three-position selector switch.
d. maintained contact push button.
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Explain by drawing how intermediate switch is working in ON and OFF position.
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Industrial Motor Controls
8.a. A typical motor speed control circuit that is controlled by an analog current loop will have a current ofA. 4-20 mA.B. 2-20 mA.C. 5-50 mA.D. 0-10 mA.8.b. Which one of the following statements is true of a disabled contact or coil?A. The disabled element has been automatically disabled due to module failure.B. The disabled element is held false by the PLC.C. A disabled contact or coil is caused by a faulty memory location in the PLC.D. A contact must be in the disabled state before it can be forced ON or OFF.
Chapter 4 Solutions
Electric Motor Control
Ch. 4 - Identify the following symbols.Ch. 4 - Electrical symbols usually conform to which...Ch. 4 - What do the following abbreviations stand for? a....Ch. 4 - Single-pole and double-pole switch symbols are...Ch. 4 - The symbol shown is a a. polarized capacitor. b....Ch. 4 - The symbol shown is a a. normally closed float...Ch. 4 - The symbol shown is a(n) a. iron core transformer....Ch. 4 - The symbol shown is a a. normally open pressure...Ch. 4 - The symbol shown is a a. double-acting push...Ch. 4 - If you were installing the circuit in Figure 412,...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Why is the Limit Switch important?arrow_forward8. What instruction would you select for each of the following discrete input field devices to accomplish the desired task? (State the reason for your answer.) a. Turn on a light when a conveyor motor is running in reverse. The input field device is a set of con- tacts on the conveyor start relay that close when the motor is running forward and open when it is running in reverse. b. When a pushbutton is pressed, it operates a so- lenoid. The input field device is a normally open pushbutton. c. Stop a motor from running when a pushbutton is pressed. The input field device is a normally closed pushbutton. d. When a limit switch is closed, it triggers an instruc- tion ON. The input field device is a limit switch that stores a 1 in a data table bit when closed.arrow_forwardWhat are some applications of temperature-actuated switches?arrow_forward
- The figure below shows the closed loop position control block diagram of a spring mass damper system. Based on this figure , answer the following questions (13-21) 13. Block number 3 represents.. . function * ...transfer 6 20s+50 2 2s $2+8s+4 (4) (5) (1) (2) (3) 10 Position Sensor Controller Process O Actuatorarrow_forwardRequired information A fan is to run only when all of the following conditions are met: • Input A is OFF. • Input B is ON or input C is ON, or both B and Care ON. • Inputs D and E are both ON. . One or more of inputs F, G, or H are ON. Saved Note: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Identify the correct typical PLC ladder logic diagram for the given control system. Multiple Choicearrow_forwardWhat is a limit switch?arrow_forward
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