Question 2 A balanced delta-connected load of 21 + j12 N per phase is connected at the end of a three-phase line. The line impedance is 0.5+j4 2 per phase. The line is supplied from a three-phase source with a line-to-line voltage of 390 V (rms). Taking the voltage on phase a as the reference, determine the following: ao- |VL| bo Co- Zline ww www b a (1) Determine the voltage in phase a (taking phase a as the reference) (2) Determine the current in phase a (3) Determine the total complex power supplied from the source. Zload/phase

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Question 2
A balanced delta-connected load of 21 + j12 № per phase is connected at the end of a three-phase
line. The line impedance is 0.5+j4 № per phase. The line is supplied from a three-phase source with
a line-to-line voltage of 390 V (rms). Taking the voltage on phase a as the reference, determine the
following:
ao
|VL|
bo
Co
Zline
www
b
a
Zload/phase
(1) Determine the voltage in phase a (taking phase a as the reference)
(2) Determine the current in phase a
(3) Determine the total complex power supplied from the source.
(4) If the line impedance is neglected, determine the impedance (in 2) of the shunt capacitor per
phase to improve the power factor to 0.9.
Transcribed Image Text:Question 2 A balanced delta-connected load of 21 + j12 № per phase is connected at the end of a three-phase line. The line impedance is 0.5+j4 № per phase. The line is supplied from a three-phase source with a line-to-line voltage of 390 V (rms). Taking the voltage on phase a as the reference, determine the following: ao |VL| bo Co Zline www b a Zload/phase (1) Determine the voltage in phase a (taking phase a as the reference) (2) Determine the current in phase a (3) Determine the total complex power supplied from the source. (4) If the line impedance is neglected, determine the impedance (in 2) of the shunt capacitor per phase to improve the power factor to 0.9.
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