A balanced star-connected load is supplied from a symmetrical three-phase, 400 V (line-to-line) supply. The current in cach phase is 50 A and lags 30° behind the phase voltage. Calculate: 1) the phase voltage 2) the phase impedance 3) the active and reactive power drawn by the load 4) sketch the phasor diagram showing the phase and line voltages. [5]Q.3 A three-phase star connected balanced load is supplied from a symmetrical three phase,400 V (line to line) supply. The current in each phase is 50 A and lags 30° behind therespective phase voltages. Calculate (a) phase voltageactive power (d) reactive power drawn by the load.(b) phase impedance (c)RR400 VoltsYYB

The given circuit diagram is shown below: It is given that: VL=400 VIL=50∠-30° A

Answered: R R 400 Volts Y Y B B.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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A balanced star-connected load is supplied from a symmetrical three-phase, 400 V (line-to-line) supply. The current in cach phase is 50 A and lags 30° behind the phase voltage. Calculate: 1) the phase voltage 2) the phase impedance 3) the active and reactive power drawn by the load 4) sketch the phasor diagram showing the phase and line voltages.

[5]
Q.3 A three-phase star connected balanced load is supplied from a symmetrical three phase,
400 V (line to line) supply. The current in each phase is 50 A and lags 30° behind the
respective phase voltages. Calculate (a) phase voltage
active power (d) reactive power drawn by the load.
(b) phase impedance (c)
R
R
400 Volts
Y
Y
B

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