The circuit diagram of a wye wye transformer is shown below. It has a neutral to ground resistor in the right side winding. Again, the transformer turns ratio is 1 in this problem. Calculate the currents IA, IB and IC for the zero sequence currents Ia=Ib=Ic=1/0o

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 3.16P: A single-phase, 50-kVA,2400/240-V,60-Hz distribution transformer has the following parameters:...
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  1. The circuit diagram of a wye wye transformer is shown below. It has a neutral to ground resistor in the right side winding.  Again, the transformer turns ratio is 1 in this problem.
    1. Calculate the currents IA, IB and IC for the zero sequence currents Ia=Ib=Ic=1/0o
    2. Calculate the current in neutral resistor Rn, and the voltage across this resistor.
    3. Calculate the neutral to ground current in the right side winding.
    4. What is the value of the neutral to ground current in the right side winding when Rn is replaced by an open circuit?
    5. Draw the zero sequence circuit of this transformer, and show the zero sequence current flow in this diagram when Rn is finite.
2. The circuit diagram of a wye wye transformer is shown below. It has a neutral to ground
resistor in the right side winding. Again, the transformer turns ratio is 1 in this problem.
a. Calculate the currents IA, IB and IC for the zero sequence currents la-lb-lc-1/0°
b. Calculate the current in neutral resistor Rn, and the voltage across this resistor.
Calculate the neutral to ground current in the right side winding.
C.
d.
What is the value of the neutral to ground current in the right side winding when Rn is
replaced by an open circuit?
e.
Draw the zero sequence circuit of this transformer, and show the zero sequence current
flow in this diagram when Rn is finite.
TAX
Tox
जी
N
A
B
O
Qu
a:1
a: 1
a:1
a
b
ου
C
R₁
Tax
دعا
Transcribed Image Text:2. The circuit diagram of a wye wye transformer is shown below. It has a neutral to ground resistor in the right side winding. Again, the transformer turns ratio is 1 in this problem. a. Calculate the currents IA, IB and IC for the zero sequence currents la-lb-lc-1/0° b. Calculate the current in neutral resistor Rn, and the voltage across this resistor. Calculate the neutral to ground current in the right side winding. C. d. What is the value of the neutral to ground current in the right side winding when Rn is replaced by an open circuit? e. Draw the zero sequence circuit of this transformer, and show the zero sequence current flow in this diagram when Rn is finite. TAX Tox जी N A B O Qu a:1 a: 1 a:1 a b ου C R₁ Tax دعا
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