A 380 V, 144 HP, 4 poles, 50 Hz, 0.9 leading Power Factor, A-connected synchronous motor has an armature resistance of 0.0 N, and a synchronous reactance of 2.0 N. This motor is operating at lA = 80 Amperes, PF= 1.0 The field current is changed until this motor operates at 0.9 Lagging power factor under the same load. Find lA, and EA- Select one: O a. |lA|= 80.0 A , and EA = 342.05 L-24.9 ° Volts O b. |lAl = 89.0 A , and EA = 472.2 L-17.75 ° Volts O c. |lA|= 72.0 A , and EA = 342.7 L-22.2 ° Volts O d. |lA| = 88.9 A, and EA = 342.2 L-27.88 ° Volts O e. None

A 380 V, 144 HP, 4 poles, 50 Hz, 0.9 leading Power Factor, A-connected synchronous motor has an armature resistance of 0.0 N, and a synchronous reactance of 2.0 N. This motor is operating at lA = 80 Amperes, PF= 1.0 The field current is changed until this motor operates at 0.9 Lagging power factor under the same load. Find lA, and EA- Select one: O a. |lA|= 80.0 A , and EA = 342.05 L-24.9 ° Volts O b. |lAl = 89.0 A , and EA = 472.2 L-17.75 ° Volts O c. |lA|= 72.0 A , and EA = 342.7 L-22.2 ° Volts O d. |lA| = 88.9 A, and EA = 342.2 L-27.88 ° Volts O e. None

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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