Electric Motor Control

10th Edition
Publisher: CENGAGE L
ISBN: 9781133702818



Electric Motor Control

10th Edition
Publisher: CENGAGE L
ISBN: 9781133702818
Chapter 8, Problem 8SQ
Textbook Problem

Are “ON” control stations used in multiple locations connected in series or parallel for latched-in contactors?

To determine

Explain whether the “ON” control stations that are used in multiple locations for latched-in contactors are connected in series or parallel.

Explanation of Solution


Mechanically held contractors or latched-in contractors are electromechanical devices that are operated by electromagnets and principles of electromagnetics. It is used as auxiliary devices to control large motor starters, switch control circuits, contactor coils, and small loads.

Refer to Figure 8-13 in the textbook for the control circuit for a mechanically held lightning contactor controlled from two locations...

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