Refer to the circuit shown in Figure 37–1. Assume that timer TR is set for a delay of 10 seconds. When the Start button is pressed, the motor starts in low speed. After a delay of 30 seconds, the motor is still in its lowest speed and has not accelerated to normal speed. Which of the following could not cause this condition? a. The Start button is shorted. b. Timer coil TR is open. c. Contactor coil R is open. d. Timed contact TR did not close after a delay of 10 seconds.
Refer to the circuit shown in Figure 37–1. Assume that timer TR is set for a delay of 10 seconds. When the Start button is pressed, the motor starts in low speed. After a delay of 30 seconds, the motor is still in its lowest speed and has not accelerated to normal speed. Which of the following could not cause this condition? a. The Start button is shorted. b. Timer coil TR is open. c. Contactor coil R is open. d. Timed contact TR did not close after a delay of 10 seconds.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Refer to the circuit shown in Figure 37–1. Assume that timer TR is set for a delay of 10 seconds. When the Start button is pressed, the motor starts in low speed. After a delay of 30 seconds, the motor is still in its lowest speed and has not accelerated to normal speed. Which of the following could not cause this condition?
a. The Start button is shorted.
b. Timer coil TR is open.
c. Contactor coil R is open.
d. Timed contact TR did not close after a delay of 10 seconds.
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