Answered: Reconnecting Induction Motors 3.a. A…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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- Reconnecting Induction Motors

3.a. A three-phase 575-volt motor requires a voltage of 991 volts after being reconnected to a 4-parallel Y
connection. Instead of applying this odd-voltage, however, the customer prefers to use 575 volts. Which
one of the following coil-group connections makes operation on 575 volts possible?
A. 4-parallel △
B. 2-parallel Y
C. 2-parallel △
D. 3-parallel Y

3.b. When a motor is reconnected from 6 poles to 4 poles with no other changes, the magnetic flux density of
the stator
A. decreases in the core and increases in the teeth.
B. decreases in the core and the teeth.
C. increases in the core and decreases in the teeth.
D. increases in the core and the teeth.

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