Electric Motor Control

10th Edition
Publisher: CENGAGE L
ISBN: 9781133702818



Electric Motor Control

10th Edition
Publisher: CENGAGE L
ISBN: 9781133702818
Chapter 27, Problem 2SQ
Textbook Problem

What is meant by an “open transition” from start to run? Why is this condition objectionable at times when used with large horsepower motors?

To determine

Explain the term “open transition” from start to run and the reason why this condition is objectionable at times when used with large horse power motors.

Explanation of Solution

In the operation of motors, starting with the use of an open transition starters, an “open transition” condition describes that the motor is momentarily disconnect from the supply during the start to run. In case large horsepower motors, these criteria will cause to the large current interruption and restoration on a supply line of the motor, and will cause for voltage fluctuations. This difficulty on the motor will disturb the other operating equipment in the system...

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