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A 30 hp, three-phase, wye connected, 60 Hz, 360 V, synchronous motor is operating at 50% full load, rated voltage and 0.8 pf leading. The motor has negligible armature resistance and a synchronous reactance of 2.5 W /phase. Stator core loss is 1kW and friction and windage loss is 1.5 kW. Use this information to answer question What is the reactive power exported to the grid when the motor load is 30 hp the line-to-neutral excitation voltage is 255 V? and A. 4.71 kVar B. 6.69 kVar C. 6.99 kVar D. 7.41 kVar E. 9.66 kVar

A 30 hp, three-phase, wye connected, 60 Hz, 360 V, synchronous motor is operating at 50% full load, rated voltage and 0.8 pf leading. The motor has negligible armature resistance and a synchronous reactance of 2.5 W /phase. Stator core loss is 1kW and friction and windage loss is 1.5 kW. Use this information to answer question What is the reactive power exported to the grid when the motor load is 30 hp the line-to-neutral excitation voltage is 255 V? and A. 4.71 kVar B. 6.69 kVar C. 6.99 kVar D. 7.41 kVar E. 9.66 kVar

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 30 hp, three-phase, wye connected, 60 Hz, 360 V, synchronous motor is operating at 50% full load, rated voltage and 0.8 pf leading. The motor has negligible armature resistance and a synchronous reactance of 2.5 W /phase. Stator core loss is 1kW and friction and windage loss is 1.5 kW. Use this information to answer question What is the reactive power exported to the grid when the motor load is 30 hp the line-to-neutral excitation voltage is 255 V? and A. 4.71 kVar B. 6.69 kVar C. 6.99 kVar D. 7.41 kVar E. 9.66 kVar
Transcribed Image Text:A 30 hp, three-phase, wye connected, 60 Hz, 360 V, synchronous motor is operating at 50% full load, rated voltage and 0.8 pf leading. The motor has negligible armature resistance and a synchronous reactance of 2.5 W /phase. Stator core loss is 1kW and friction and windage loss is 1.5 kW. Use this information to answer question What is the reactive power exported to the grid when the motor load is 30 hp the line-to-neutral excitation voltage is 255 V? and A. 4.71 kVar B. 6.69 kVar C. 6.99 kVar D. 7.41 kVar E. 9.66 kVar
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