Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Textbook Question
Chapter 32, Problem 1PA
You are working as a plant electrician. It is your job to install a 300-hp three-phase squirrel-cage induction motor. The supply voltage is 480 V. The power company has determined that the maximum amount of starting current that can be permitted by any motor in the plant is 3000 A. The motor nameplate is as follows:
| Phase: 3 | FLA: 352 |
| Volts: 480 | RPM: 1755 |
| Frame: XXX | Code: L |
Will it be possible to start this motor across the line, or will it be necessary to use a reduced-voltage starter to reduce starting current?
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What are the following statements are true for a three-phase induction motor?
I. Three-phase induction motor stator winding is fed from a three-phase supply
II. Stator carries a three-phase winding
III. Rotor carries a short circuited winding
a.
I and II only
b.
I,II and III
c.
II and III
d.
I only
Electrical Engineering
DRAW THE FOLLOWING DIAGRAMS OF INDUCTION MOTOR AND LABEL THEM
( MAKE SURE THAT THE DIAGRAMS SHOULD BE NEAT AND SHOULD BE HAND DRAWN WITH BLUE BALL PEN ON BLANK PAGES )
1) 3-phase 2-pole motor
2) 3-phase 4 pole motor
3) 3-phase 6 pole motor
4) 3-phase 8 pole moto
can you answer this thank
Chapter 32 Solutions
Delmar's Standard Textbook Of Electricity
Ch. 32 - What are the three basic types of three-phase...Ch. 32 - What is the principle of operation of all...Ch. 32 - What is synchronous speed?Ch. 32 - What two factors determine synchronous speed?Ch. 32 - Prob. 5RQCh. 32 - Name three factors that determine the torque...Ch. 32 - Is the synchronous motor an induction motor?Ch. 32 - Prob. 8RQCh. 32 - Why must a synchronous motor never be started when...Ch. 32 - Name three characteristics that make the...
Ch. 32 - What is the function of the field-discharge...Ch. 32 - Why can an induction motor never operate at...Ch. 32 - A squirrel-cage induction motor is operating at...Ch. 32 - Prob. 14RQCh. 32 - Prob. 15RQCh. 32 - Prob. 16RQCh. 32 - Name three factors that determine the amount of...Ch. 32 - Why will the rotor of a wound-rotor motor not turn...Ch. 32 - Why is the starting torque per A of starting...Ch. 32 - When is a synchronous motor a synchronous...Ch. 32 - What determines when a synchronous motor is at...Ch. 32 - How can a synchronous motor be made to have a...Ch. 32 - Is the excitation current of a synchronous motor...Ch. 32 - Prob. 24RQCh. 32 - Prob. 25RQCh. 32 - You are working as a plant electrician. It is your...Ch. 32 - You have been given the task of connecting a...Ch. 32 - You are an electrician working in an industrial...
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