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A 3-phase motor is connected to a voltage of 400 V and has a power of 50 kW at full load. When the engine is running at full load, it is delta connected, while at start-up it is star connected. a) Calculate the phase voltage and phase current when running at full load. b) Calculate the phase voltage and phase current at start-up. c) We suspect that one of the supply lines to the motor has been broken. Draw the form for the break in both the delta and star cases. ..

A 3-phase motor is connected to a voltage of 400 V and has a power of 50 kW at full load. When the engine is running at full load, it is delta connected, while at start-up it is star connected. a) Calculate the phase voltage and phase current when running at full load. b) Calculate the phase voltage and phase current at start-up. c) We suspect that one of the supply lines to the motor has been broken. Draw the form for the break in both the delta and star cases. ..

Introductory Circuit Analysis (13th Edition)
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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A 3-phase motor is connected to a voltage of 400 V and has a power of 50 kW at full load. When the engine is running at full load, it is delta connected, while at start-up it is star connected.

a) Calculate the phase voltage and phase current when running at full load.

b) Calculate the phase voltage and phase current at start-up.

c) We suspect that one of the supply lines to the motor has been broken. Draw the form for the break in both the delta and star cases.

..

 

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