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Electric Motor Control

10th Edition
Herman
Publisher: CENGAGE L
ISBN: 9781133702818

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BuyFindarrow_forward

Electric Motor Control

10th Edition
Herman
Publisher: CENGAGE L
ISBN: 9781133702818
Chapter 3, Problem 2SQ
Textbook Problem
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How many poles are required on motor starters for the following motors: (a) 240-volt, single-phase induction motor, (b) 440-volt, three-phase induction motor?

(a)

To determine

Find the number of poles required on motor starter for a 240-volt, single-phase induction motor.

Explanation of Solution

Discussion:

The number of poles refers to the number of power contacts required for the electrical supply service.

The single-phase induction motor is a two-wire (phase and neutral) system and it requ...

(b)

To determine

Find the number of poles required on motor starter for a 440-volt, three-phase induction motor.

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