Answered: L1 L2 13 кб Σ W M 1 HI coil 1 coil 3…

Engineering

Electrical Engineering

L1 L2 13 кб Σ W M 1 HI coil 1 coil 3 coil 1 coil 3 coil 2 3 3 Start Configuration 7 2 coil 2 Run Configuration 2

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 8RQ

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Question

For the starting method given in task 8, redraw each of the symbols used in the control circuit and give a brief explanation of their purpose.

Task 8 below (Task 8 has been answered already)

(There are many methods used for starting induction motors and synchronous machines. For the following three methods of starting three-phase motors, explain how the starting method works and state the type of motor the starter is designed for. Support your answer with illustrations:

Star-Delta
Rotor Resistance
Induction starting (with damper windings).)

coil 1
coil 3
coil 1
coil 3
coil 2
3
3
Start Configuration
7 2
coil 2
Run Configuration
2

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