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Referring to the circuit shown in Figure 23–1, would it be possible to change the components that have been numbered with an 8 to a number 9, and the components that have been numbered with a 9 to a number 8, without affecting the operation of the circuit?
Whether it is possible to change the components that are numbered with an
Explanation of Solution
Consider that the schematic diagram shows the circuit operation and not the wiring of the components. The wiring diagram is drawn that is based on how the components are numbered, thus it shows how the wiring is done.
The components in schematic diagrams are numbered in the sequence of connection order.
Refer to the circuit shown in Figure 23-1 as shown in the text book.
Consider that the machine consist of the three motors and when it is started there is a time delay of 10 sec. As the start button is pressed the circuit gets completed with the start button and the motor coil and
This shows that
The number changing of the components is not practical as each of the components is assigned a specific number in a schematic diagram.
Consider that the two relays one and two are interchanged with their position then, then, the motor M3 works when the relay TR1 is closed and the M2 works only when the TR2 is closed.
Thus, the changing of the component numbers
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Chapter 23 Solutions
Industrial Motor Control
- Following the procedure discussed in Chapter 7, place wire numbers on the schematic in Figure 8–7. Place corresponding wire numbers on the components shown in Figure 8–8.arrow_forwardTo answer the following questions refer to the circuit shown in Figure 4110. Assume that the third speed push button is pressed and the motor starts in its first or lowest speed. After a delay of 3 seconds, the motor accelerates to its second speed, but never accelerates to its highest or third speed. Which of the following could cause this problem? a. CR coil is open. b. Coil 2TR is open. c. Coil 1TR is open. d. Coil 1S is open.arrow_forwardRefer to the circuit shown in Figure 15-6. The STOP button is shown to be an emergency STOP button. What does the symbol used for the STOP button actually represent?arrow_forward
- To answer the following questions refer to the circuit shown in Figure 41–10. Assume that the third speed push button is pressed. Explain the sequence of operation for the circuit.arrow_forwardRefer to the circuit shown in Figure 25–5. Assume that timer TR1 is set for a delay of 10 seconds and timer TR2 is set for a delay of 5 seconds. When the START button is pressed, the motor starts. After 10 seconds the S1 contacts open and the motor continues to accelerate, but never reaches full speed. After a delay of about 30 seconds, the motor trips out on overload. Which of the following could cause this problem? TR1 coil is open. S2 coil is open. S1 coil is open. R coil is open.arrow_forwardRefer to the circuit shown in Figure 7-10. If wire number 11 were disconnected at the normally open auxiliary M contact, how would the circuit operate? Figure 7-10 Numbers are placed beside all components.arrow_forward
- In the following parallel circuit, what is the equivalent resistance and the total current in the circuit?arrow_forwardRefer to the circuit shown in Figure 4221. Assume that the THIRD SPEED push button is pressed. The motor starts in second speed, skipping first speed. After 5 seconds, the motor accelerates to third speed. Which of the following could cause this problem? a. S1 contactor coil is open. b. CR1 contactor coil is open. c. TRl timer coil is open. d. S1 load contacts are shorted.arrow_forwardThis is the problem number 2 and answer the question 3 thank youarrow_forward
- List two methods of performing the operation described in the previous question.arrow_forwardFind the Degree of Freedom of the following figure.arrow_forwardRefer to the circuit shown in Figure 247. Assume that all timers are set for a delay of 5 seconds. When the START button is pressed the motor starts in its lowest speed. After a delay of over 10 seconds, the motor is still running in the lowest speed. Which of the following could cause the problem? a. TR1 coil is open. b. TR1 coil is shorted. c. S2 coil is open. d. S1 coil is shorted.arrow_forward
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