Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 48, Problem 7SQ
What happens if the reverse push button is closed when the motor is running in the forward direction as in Figure 48–5?
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question 7:
If the timer is set for 10 seconds when will motor 2 start?
a
10 seconds after the start button is pushed
b
10 seconds after the control relay closes
c
10 seconds after motor 1 starts
d
Instantly when the start button is pushed
What is the purpose of the N/O contact in parallel with the start button in the magnetic start control circuit
..
control system
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Chapter 48 Solutions
Electric Motor Control
Ch. 48 - In Figure 482, what is the purpose of normally...Ch. 48 - Can a time-delay relay be used satisfactorily in a...Ch. 48 - Prob. 3SQCh. 48 - Prob. 4SQCh. 48 - Prob. 5SQCh. 48 - What is the purpose of the lockout relay or safety...Ch. 48 - What happens if the reverse push button is closed...Ch. 48 - Prob. 8SQCh. 48 - Prob. 9SQCh. 48 - In Figure 487, is it necessary to push the stop...
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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
- Select the best answer for each of the following. When the reset button does not reestablish the control circuit after an overload, the probable cause is a. the overload heater is too small. b. the overload trip has not cooled sufficiently. c. the auxiliary contacts are defective. d. the overload heater is burned out.arrow_forwardIn Figure 487, is it necessary to push the stop button when changing the direction of rotation? Explain your answer.arrow_forwardIn Figure 327, the motor cannot be started in high speed. Why?arrow_forward
- Describe how pressure switches are connected to start and stop (a) small motors and (b) large motors.arrow_forwardWhat is the purpose of a starting relay? to start an electric motor to remove the starting winding or component from the circuit to protect the motor from starting overloads to prevent the motor from starting under heavy loadsarrow_forwardcontrol system answer pleasae as soon as possiblearrow_forward
- A forward-reverse motor starter must be prevented from form reversing while running in the forward rotation. What is done? a. install electrical limit switches b. install electrical interlocking c. install a NC stop button d. install a NO pushbutton.arrow_forwardRefer to the circuit shown in Figure 105. If the pressure should become high enough for the pressure switch to close and stop the motor, is it possible to restart the motor before the pressure drops to a safe level?arrow_forwardWhy does the emergency switch turn off by pressing it and turns on when turned forward ?arrow_forward
- Does the Indoor Fan Motor stop when the control fuses faulty?arrow_forwardWhat might be a hazard if a motor is started in the wrong direction?arrow_forwardA selector switch Andrés two- aire piloto debiese cannot be used to comtrol a larger motor directly but rather must be connected to the magnetic starter. Why this is true?arrow_forward
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