A three-phase wye-connected load is supplied by an abc-sequence balanced three-phase wye-connected source with a phase voltage of 120 V rms. If the line impedance and load impedance per phase are 1 +j1 ohms 20 + j10 ohms respectively. a) the line currents are A/- Degrees Degrees lec" A/ Degrees

A three-phase wye-connected load is supplied by an abc-sequence balanced three-phase wye-connected source with a phase voltage of 120 V rms. If the line impedance and load impedance per phase are 1 +j1 ohms 20 + j10 ohms respectively. a) the line currents are A/- Degrees Degrees lec" A/ Degrees

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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Concept explainers

Single Phase AC Circuit

Alternating Current (AC) is a type of electric power in which the electric current changes, both in magnitude and direction, at regular intervals. This AC Circuits can deliver power in either a Single Phase system or a Three Phase system.

Question

A three-phase wye-connected load is supplied by an abc-sequence balanced three-phase wye-connected source with a phase voltage of 120 V rms. If the line impedance and load
impedance per phase are 1 + j1 ohms 20 + j10 ohms respectively.
a) the line currents are
la4 =
A/
Degrees
Degrees
Icc =
A/-
Degrees

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A balanced three phase system has a distribution wire impedance 2+j6 ohms per phase. The system supplies two three phase loads that are connected in parallel. The first is a balanced wye-connected load absorbs 400kVA at a power factor of 0.8 lagging. The second load is a balance delta-connected load with impedance of 10+j8 ohms per phase. If the magnitude of the line voltage at the loads is 2400V rms, Calculate the magnitude of the line voltage at the source and the total complex power supplied to the two loads.
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