Industrial Motor Control
7th Edition
ISBN: 9781133691808
Author: Stephen Herman
Publisher: Cengage Learning
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Question
Chapter 12, Problem 1RQ
To determine
The average amount of current flowing in two remaining phases.
Expert Solution & Answer
Explanation of Solution
Given:
The name plate current of three-phase motor is 56 A.
Calculation:
A failure phase occurs when power is lost from a three-phase motor power supply line. The motor is still running, but it draws excessive current. This phenomenon is known as Single phasing. Single phasing causes a current increase of 173% in average of both phases which remain energized in a three-phase motor.
Calculate the current flowing in two remaining phases:
Thus, the average amount of current flowing in two remaining phases is
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Chapter 12 Solutions
Industrial Motor Control
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