Industrial Motor Control
7th Edition
ISBN: 9781133691808
Author: Stephen Herman
Publisher: Cengage Learning
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Textbook Question
Chapter 41, Problem 10RQ
Refer to the circuit shown in Figure 41–10. You are to construct this circuit on the job. Would it be possible to use an 11-pin control relay for 4CR?
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Industrial Motor Control
Ch. 41 - Prob. 1RQCh. 41 - Prob. 2RQCh. 41 - What is the advantage of consequent pole motors...Ch. 41 - Prob. 4RQCh. 41 - Refer to the circuit shown in Figure 416. You are...Ch. 41 - Refer to the circuit shown in Figure 41–6. What is...Ch. 41 - Refer to the circuit shown in Figure 41–7. When...Ch. 41 - Prob. 8RQCh. 41 - Refer to the circuit shown in Figure 41–10....Ch. 41 - Refer to the circuit shown in Figure 4110. You are...
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- Refer 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_forwardRefer to the circuit shown in Figure 108. In this circuit, the jog button has been connected incorrectly. The normally closed section has been connected in parallel with the run push button and the normally open section has been connected in series with the holding contacts. Explain how this circuit operates.arrow_forwardRefer to the circuit shown in Figure 33–11. Explain the action of the circuit if coil 2CR is shorted and the second speed push button is pressed.arrow_forward
- Refer to the circuit shown in Figure 109. In this circuit the jog push button has again been connected incorrectly. The normally closed section of the button has been connected in series with the normally open run push button and the normally open section of the jog button is connecting in parallel with the holding contacts. Explain how this circuit operates.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 336. What is the function of contactor 2L?arrow_forward
- Refer to the circuit shown in Figure 33–6. You are to install this control system. How many auxiliary contacts should starter 1L contain and how many are normally open and how many are normally closed?arrow_forwardRefer to the circuit shown in Figure 16-11. Assume that the platform is located on the bottom floor. When the UP push button is pressed the pump motor does not start. Which of the following could not cause this problem? The contacts of limit switch LS1 are open. The contacts of limit switch LS2 are open. Motor starter coil M is open. The overload contact is open.arrow_forwardRefer to the circuit shown in Figure 107. Assume that when the start button is pressed the motor does not start, but when the inch push button is pressed the motor runs at reduced speed. Which of the following could NOT cause this problem? a. The control transformer fuse is blown. b. M starter coil is defective. c. The start push button is defective. d. The stop push button is defective.arrow_forward
- Refer 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_forwardRefer to the circuit shown in Figure 2614. When the START button is pressed, the control transformer fuse blows immediately. Which of the following could not cause this problem? a. Control relay coil CR is shorted. b. Starter coil 1M is shorted. c. Contactor coil S is shorted. d. Contactor coil 2M is shorted.arrow_forwardRefer to the circuit shown in Figure 5-29. In this circuit, the HR contactor is equipped with five contacts. Three are load contacts and two are auxiliary contacts. From looking at the schematic diagram, how is it possible to identify which contacts are the load contacts and which are the auxiliary contacts? Figure 5-29 The contactor contains both load and auxiliary contacts.arrow_forward
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