Electric Motor Control

10th Edition
Publisher: CENGAGE L
ISBN: 9781133702818



Electric Motor Control

10th Edition
Publisher: CENGAGE L
ISBN: 9781133702818
Chapter 2, Problem 4SQ
Textbook Problem

What does the term trip-free mean as it relates to manual starters?

To determine

Explain the meaning of the term trip-free relates to a manual starter.

Explanation of Solution


Fractional horse power (FHP) manual starters have thermal or overload protection equipment. The starter’s handle moves to the center position when the load exceeds the normal range in the system.

The contacts gets open and disconnect the motor very quickly from the supply. Therefore, the motor stops its operation. The contacts are advised to close after the overload protection equipment cools completely...

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