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Electric Motor Control

10th Edition
Herman
Publisher: CENGAGE L
ISBN: 9781133702818

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BuyFindarrow_forward

Electric Motor Control

10th Edition
Herman
Publisher: CENGAGE L
ISBN: 9781133702818
Chapter 10, Problem 6SQ
Textbook Problem
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Refer to the circuit shown in Figure 10–5. If the pressure should become high enough for the pressure switch to close and stop the motor, is it possible to restart the motor before the pressure drops to a safe level?

To determine

Whether it is possible to restart the motor before the pressure drops to a safe level.

Explanation of Solution

Discussion:

Refer to Figure 10-5 in the textbook for the illustration of high pressure turning off the motor and turning on a warning light.

Pressure switches are mostly used in industrial applications to turn on a pilot and to turn off a motor.

In Figure 10-5, the pressure switch is connected in series with control relay (PSCR). If the pressure is too high, the normally opened pressure switch closes automatically, which in turn makes the control relay (PCSR) to open...

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