A balanced three-phase distribution line has an impedance of 1+j8 Ω/ϕ. This line is used to supply three balanced three-phase loads that are connected in parallel. The three loads are L1=120 kVA at 0.96 pf leading, L2=180 kVA at 0.80 pf lagging, and L3=100.8 kW and 15.6 kVAR (magnetizing). The magnitude of the line voltage at the terminals of the loads is 24003 V. 1. a) What is the magnitude of the line voltage at the sending end of the line? 2. b) What is the percent efficiency of the distribution line with respect to average power?

A balanced three-phase distribution line has an impedance of 1+j8 Ω/ϕ. This line is used to supply three balanced three-phase loads that are connected in parallel. The three loads are L1=120 kVA at 0.96 pf leading, L2=180 kVA at 0.80 pf lagging, and L3=100.8 kW and 15.6 kVAR (magnetizing). The magnitude of the line voltage at the terminals of the loads is 24003 V. 1. a) What is the magnitude of the line voltage at the sending end of the line? 2. b) What is the percent efficiency of the distribution line with respect to average power?

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.43P: Three single-phase transformers, each rated 10MVA,66.4/12.5kV,60Hz, with an equivalent series...

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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.

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1. a) What is the magnitude of the line voltage at the sending end of the line?

2. b) What is the percent efficiency of the distribution line with respect to average power?

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