Q#1: In a 3-phase, 4-wire system, the currents in R, Y and B lines under abnormal conditions of loading are as under IR = 100 230° A ; Iy=50 2300° A ; IB = 30 2180° A Calculate the positive, negative and zero sequence currents in the R-line and return current in the neutral wire.

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 3.33P: Consider the three single-phase two-winding transformers shown in Figure 3.37. The high-voltage...
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Q#1: In a 3-phase, 4-wire system, the
currents in R, Y and B lines under
abnormal conditions of loading are as
under
IR = 100 230° A ; Iy = 50 2300° A
; IB = 30 2180° A
Calculate the positive, negative and
zero sequence currents in the R-line
and return current in the neutral wire.
Q#2: A balanced star connected load takes 90
A from a balanced 3-phase, 4-wire supply. If
the fuses in
the Y and B phases are removed, find
the symmetrical components of the line
currents (i) before
the fuses are removed (ii) after the
fuses are removed
IR
R
Fuses
ly
Y
Transcribed Image Text:Attempt All Questions. Q#1: In a 3-phase, 4-wire system, the currents in R, Y and B lines under abnormal conditions of loading are as under IR = 100 230° A ; Iy = 50 2300° A ; IB = 30 2180° A Calculate the positive, negative and zero sequence currents in the R-line and return current in the neutral wire. Q#2: A balanced star connected load takes 90 A from a balanced 3-phase, 4-wire supply. If the fuses in the Y and B phases are removed, find the symmetrical components of the line currents (i) before the fuses are removed (ii) after the fuses are removed IR R Fuses ly Y
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