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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 11, Problem 2SQ
Textbook Problem
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In Figure 11–5, why does the sump pump motor not start when the lower float switch closes?

To determine

Explain the reason for not starting of sump pump motor when the lower float switch is closed in Figure 11-5 in the textbook.

Explanation of Solution

Discussion:

Refer to Figure 11-5 in the textbook for control circuit for two float switches. The float switches (lower float and upper float switches) are connected in series. The sump pump motor is connected in series with the float switches.

As the sump pump motor is connected in series with both the float switches, both the float switches must be closed in order to start the motor...

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