If the system in Example 8 has line transmission with impedance determine the phase current. 10 +j122,

Introductory Circuit Analysis (13th Edition)
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Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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balanced A-Y system
A balanced abc-sequence delta-connected source V,ine = 210 V. Is connected
to a Y-connected balanced load 40+ j25 N per phase.
1. Calculate the phase currents and use Vahas reference.
2. Draw the phasor diagram
%3D
Solution
The load impedance is
Zy
Zy = 40 + j25 = 47.17/32° 2
Vk
and the source voltage is
Ży
Vab = 210/0° V
C
B
When the A-connected source is transformed to a Y-connected source,
-30° =
121.2/-30° V
%3D
The line currents are
121.2/-30
Zy
V
L =
2.57/-62 A
%3D
Zy
47.12/32
I, = L/-120°= 2.57/-178° A
I = L/120° = 2.57/58° A
which are the same as the phase currents.
Transcribed Image Text:balanced A-Y system A balanced abc-sequence delta-connected source V,ine = 210 V. Is connected to a Y-connected balanced load 40+ j25 N per phase. 1. Calculate the phase currents and use Vahas reference. 2. Draw the phasor diagram %3D Solution The load impedance is Zy Zy = 40 + j25 = 47.17/32° 2 Vk and the source voltage is Ży Vab = 210/0° V C B When the A-connected source is transformed to a Y-connected source, -30° = 121.2/-30° V %3D The line currents are 121.2/-30 Zy V L = 2.57/-62 A %3D Zy 47.12/32 I, = L/-120°= 2.57/-178° A I = L/120° = 2.57/58° A which are the same as the phase currents.
+j12,
If the system in Example 8 has line transmission with impedance
determine the phase current.
10
Transcribed Image Text:+j12, If the system in Example 8 has line transmission with impedance determine the phase current. 10
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