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A balanced A-connected load has an impedance of 60 + j45 /6. The load is fed through a line having an impedance of 0.8 + j0.6 0/6. The phase voltage at the terminals of the load is 480 V. The phase se- quence is positive. Use V a) Calculate the three phase currents of the load. AB as the reference. b) Calculate the three line currents. c) Calculate the three line voltages at the sending end of the line.

A balanced A-connected load has an impedance of 60 + j45 /6. The load is fed through a line having an impedance of 0.8 + j0.6 0/6. The phase voltage at the terminals of the load is 480 V. The phase se- quence is positive. Use V a) Calculate the three phase currents of the load. AB as the reference. b) Calculate the three line currents. c) Calculate the three line voltages at the sending end of the line.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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ion 11.4 3 A balanced A-connected load has an impedance of 60+j45 0/o. The load is fed through a line having an impedance of 0.8 + j0.6 /p. The phase voltage at the terminals of the load is 480 V. The phase se- quence is positive. Use VAB as the reference. a) Calculate the three phase currents of the load. b) Calculate the three line currents. c) Calculate the three line voltages at the sending end of the line.
Transcribed Image Text:ion 11.4 3 A balanced A-connected load has an impedance of 60+j45 0/o. The load is fed through a line having an impedance of 0.8 + j0.6 /p. The phase voltage at the terminals of the load is 480 V. The phase se- quence is positive. Use VAB as the reference. a) Calculate the three phase currents of the load. b) Calculate the three line currents. c) Calculate the three line voltages at the sending end of the line.
Expert Solution
Step 1:Convert balanced delta connected load in star connection

Taking source as star connection to simplify calculation. so, we have to convert balanced delta connected load into star connection.

To convert balanced delta connected load into star connection divide the delta connected load impedance by 3.

and as we know in star connection:

Vph=VL /3 and Iph=IL

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