[4] supply, ånd is found to have a lagging power factor of 0.8 when running at full load. A single-phase 3hp 120V, 60HZ induction motor is driven by a 120V, 60HZ AC i) Find the RMS value of the full-load current drawn by the motor. State which of the two entities, namely, (a) current through the motor and (b) voltage across the motor, leads which and by how many degrees under full-load conditions. Draw a phasor diagram showing these voltage and current phasors. iii,iv) Find the size of the capacitor which you would connect across the motor in order to increase the power factor at full load from 0.8 to 0.95.

Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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[4]
supply, ånd is found to have a lagging power factor of 0.8 when running at full load.
A single-phase 3hp 120V, 60HZ induction motor is driven by a 120V, 60HZ AC
i)
Find the RMS value of the full-load current drawn by the motor.
State which of the two entities, namely, (a) current through the motor and
(b) voltage across the motor, leads which and by how many degrees under full-load
conditions. Draw a phasor diagram showing these voltage and current phasors.
iii,iv) Find the size of the capacitor which you would connect across the motor in order to
increase the power factor at full load from 0.8 to 0.95.
Transcribed Image Text:[4] supply, ånd is found to have a lagging power factor of 0.8 when running at full load. A single-phase 3hp 120V, 60HZ induction motor is driven by a 120V, 60HZ AC i) Find the RMS value of the full-load current drawn by the motor. State which of the two entities, namely, (a) current through the motor and (b) voltage across the motor, leads which and by how many degrees under full-load conditions. Draw a phasor diagram showing these voltage and current phasors. iii,iv) Find the size of the capacitor which you would connect across the motor in order to increase the power factor at full load from 0.8 to 0.95.
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