Understanding Motor Controls
3rd Edition
ISBN: 9781305498129
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 3, Problem 4RQ
A push button manual starter has tripped on overload. Explain how to reset the starter so the motor can be restarted.
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Assume that when the start button is pressed M starter does not energize. List seven possible causes for this problem?
Which of the following is not part of the starter motor circuit?
When the starter spins but does not crank the engine,which of the following may be true?a. Defective starter relayb. Damaged flywheel teethc. A faulty starter solenoidd. All of the above
Chapter 3 Solutions
Understanding Motor Controls
Ch. 3 - A manual motor starter controls a single phase 120...Ch. 3 - Prob. 2RQCh. 3 - Prob. 3RQCh. 3 - A push button manual starter has tripped on...Ch. 3 - What is meant by the term line voltage on some...Ch. 3 - Explain the difference between manual motor...Ch. 3 - Prob. 7RQCh. 3 - Prob. 8RQCh. 3 - Refer to the circuit shown in Figure 310. When...Ch. 3 - Prob. 10RQ
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Explain the difference between manual motor starters that provide low voltage release and those that do not.arrow_forwardWhat is the difference between a motor starter and a contactor?arrow_forwardA manual motor starter controls a single phase 120 volt motor. The motor is not running, and theswitch handle on the starter is found to be in thecenter position. What does this indicate?arrow_forward
- Assume that when the START button is pressed M starter does not energize. List seven possible causes for this problem. a. _____________ b. _____________ c. _____________ d. _____________ e. _____________ f. _____________arrow_forwardTo answer the following questions refer to the circuit in Figure 416. When the pressure switch closes, which starter will energize first, 1M or 2M? Explain your answer.arrow_forwardA starter cranks, but cranks slowly. The shop performs a voltage drop on the ground and power side of the starter circuit and they both test good. Technician A says the battery may be bad. Technician B says the starter may be bad. Who is correct?arrow_forward
- Refer to the schematic diagram in Figure 318. Assume that the motor is not running. When the third speed push button is pressed, the motor starts in its lowest speed. After a delay of 3 seconds, the motor accelerates to second speed and 3 seconds later to third speed. After a period of about 1 minute, the fourth speed push button is pressed, but the motor does not accelerate to fourth speed. Which of the following could cause this problem? a. Control relay CR2 coil is open. b. S2 contactor coil is open. c. CR3 coil is shorted. d. S3 contactor coil is open.arrow_forwardWhen energizing or de-energizing a combination starter what safety precaution should always be taken?arrow_forwardQuestion 5: Explain what happens if it is operated without a starting rheostat; What else is used instead of the starter rheostat and how is the speed adjustment done in D.C series motor? Explain.arrow_forward
- Technician A checks a starter’s field coils for opensby connecting an ohmmeter between the coils’power feed wire and the field coil brush lead. TechnicianB checks a starter’s field coil for a short toground by connecting an ohmmeter across the fieldcoil brush lead and the starter housing. Who iscorrect?a. Technician Ab. Technician Bc. Both A and Bd. Neither A nor Barrow_forwardWhile discussing a no-crank condition: Technician A says to verify the condition of the batten' before testing the starter motor Technician B says a scan tool may be used to check starter control circuit operation. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardWhich of the following is not part of the starter motor circuit? Battery Starting safety switch Starter motor Relay solenoidarrow_forward
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