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Refer to the circuit shown in Figure 28-3. If it is assumed that the TR is set to a delay of 4 seconds. When the start button is pressed, the motor does not start. Holding the start button down for over 4 seconds does not cause the motor to start. Which of the following could not have caused this problem? a. Contractor coil S is open. b. The control transformer fuse is blown. c. OL-S contact is open. d. OL-R contact is open.

Refer to the circuit shown in Figure 28-3. If it is assumed that the TR is set to a delay of 4 seconds. When the start button is pressed, the motor does not start. Holding the start button down for over 4 seconds does not cause the motor to start. Which of the following could not have caused this problem? a. Contractor coil S is open. b. The control transformer fuse is blown. c. OL-S contact is open. d. OL-R contact is open.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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20. Refer to the circuit shown in Figure 28-3. If it is assumed that the TR is set to a delay of 4 seconds. When the start button is pressed, the motor does not start. Holding the start button down for over 4 seconds does not cause the motor to start. Which of the following could not have caused this problem? a. Contractor coil S is open. b. The control transformer fuse is blown. c. OL-S contact is open. d. OL-R contact is open.
Transcribed Image Text:20. Refer to the circuit shown in Figure 28-3. If it is assumed that the TR is set to a delay of 4 seconds. When the start button is pressed, the motor does not start. Holding the start button down for over 4 seconds does not cause the motor to start. Which of the following could not have caused this problem? a. Contractor coil S is open. b. The control transformer fuse is blown. c. OL-S contact is open. d. OL-R contact is open.
TI TS Molor T6 PTO Corol Tanslormer Two-Wre Control i Used OL-S LO-A ala TR FIG. 28-3
Transcribed Image Text:TI TS Molor T6 PTO Corol Tanslormer Two-Wre Control i Used OL-S LO-A ala TR FIG. 28-3
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