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
- Advanced industrial motorarrow_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
- Differences between VFD and Soft Starter,include their applications and when are they used.arrow_forwardIn Figure 236, what will happen if both jog push buttons are pushed momentarily?arrow_forwardMake a conventional wiring diagram to rotate a 3phase motor cw ccw with indicator lamps. When the motor rotates, a single acting cylinder extends? What happens if push buttons for cw and ccw are pressed at the same time?arrow_forward
- #21arrow_forwardConvert the control circuit only, Figure 2111, from the wiring diagram to an elementary diagram. Include the limit switches (RLS, FLS) as operating in the control circuit.arrow_forwardH.W: 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 contacts 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 solenoid. 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.arrow_forward
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