Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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Single phase transformer please solve as soon as possible...

QUESTION 12 An 6.6 kV. three-phase star-connected synchronous motor is working at full load and draws a curren of is-200 A at 0.8 p.f. leading. The armature resistance is 1.20 and synchronous reactance is 60 per phase. The rotational losses are 3 kW. Determine efficiency of the motor. a. 61% b. 67% c. 83% d. 96% e. 73% f. 88% g. 92% h. 78%
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Transcribed Image Text:QUESTION 12 An 6.6 kV. three-phase star-connected synchronous motor is working at full load and draws a curren of is-200 A at 0.8 p.f. leading. The armature resistance is 1.20 and synchronous reactance is 60 per phase. The rotational losses are 3 kW. Determine efficiency of the motor. a. 61% b. 67% c. 83% d. 96% e. 73% f. 88% g. 92% h. 78%
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