A three-phase line has an impedance of 2+ j4 fl as shown in Figure 2.19 2+j4n ww Vl = 207.85 V b- thmJ -j450 30n j400 FIGURE 2.19 Thre-phase circuit diagrum for Eaample 2.7. The line feeds two halanced thre-phase loads that are comecied in parallel The first load is Y-commected and has animpedance of 30+j40 per phase. The secand load is A-connected and has an impedance of 60-345 n. The line is energizod at the sending end from a theee-phase balanced supply of line voltage 207.85 V. Taking the phase voltage V, s reference, determine: (a) The curmat, mral power, and reactive power drawn from the supply. (b) The line voltage at the combined loads. (c) The current per phase in ench koad

A three-phase line has an impedance of 2+ j4 fl as shown in Figure 2.19 2+j4n ww Vl = 207.85 V b- thmJ -j450 30n j400 FIGURE 2.19 Thre-phase circuit diagrum for Eaample 2.7. The line feeds two halanced thre-phase loads that are comecied in parallel The first load is Y-commected and has animpedance of 30+j40 per phase. The secand load is A-connected and has an impedance of 60-345 n. The line is energizod at the sending end from a theee-phase balanced supply of line voltage 207.85 V. Taking the phase voltage V, s reference, determine: (a) The curmat, mral power, and reactive power drawn from the supply. (b) The line voltage at the combined loads. (c) The current per phase in ench koad

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

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.13MCQ

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Concept explainers

Star Delta Conversion

Find the input resistance between points A and B of the following resistive network:

Question

Example 2.7
A three-phase line has an impedance of 2 + j4 fN as shown in Figure 2.19.
2+j4n
V = 207.85 V
b-
-j450
302
j400
FIGURE 2.19
Three-phase circuit diagram for Eaample 2.7.
The line feeds twe halanced theee-phase loads that are comecied in parallel The
first load is Y-comected and has an impedance of 30+j40 per phase. The second
load is A-connected and has an impedance of 60-345 n. The line is energizod
at the sending end from a thee-phase balanced supply of line voltage 207.85 V.
Taking the phase voltage V, s reference, determine:
(a) The curmat, wal power, snd reactive power drawn from the supply.
(b) The line voltage at the combined loads.
(c) The current per phase in each koad.
(d) The total real and reactive powers in cach kad and the line

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