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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 7, Problem 4SQ
Textbook Problem
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Why are mechanically held relays energy-saving devices?

To determine

Explain the reason why mechanically held relays are energy-saving devices.

Explanation of Solution

Discussion:

Control relays are operated by electromagnets and principles of electromagnetics.

The contacts of the relay change automatically, when an electromagnet energizes and de-energizes.

As the coils of the relay are energized only momentarily, the conservation of energy is obtained...

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