A three-phase source has a phase sequence of EAS- Esc - ECA and delivers the following delta load currents: Ib 1220° A, I = 12Z - 60° A. I. = 16260° A. The line voltage EAB is 230Z0° V. If one wattmeter is connected with its current coil in line A and its potential coil across lines A and B, and a second wattmeter is connected with its current coil in line C and its potential coil across lines C and B, what will each wattmeter register, and what is the total 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
Chapter2: Fundamentals
Section: Chapter Questions
Problem 2.45P: Two balanced Y-connected loads, one drawing 10 kW at 0.8 power factor lagging and the other IS kW at...
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A three-phase source has a phase sequence of EAS- Esc-ECA and delivers the following
delta load currents: Ib 1220° A, I = 12Z - 60° A. I. = 16260° A. The line
voltage EAB is 230Z0° V. If one wattmeter is connected with its current coil in line A and
its potential coil across lines A and B, and a second wattmeter is connected with its
current coil in line C and its potential coil across lines C and B, what will each wattmeter
register, and what is the total power?
An abc-sequence, three-phase, 4-wire, 380-V supply is connected to an unbalanced
load having phase impedances of: Za = 8 + j6 0, Zb = 8-j6 Q and Zc = 5 Q. Impedance
of the neutral wire is 0.5 + j1 Q. Line impedance is 1 + j2 0 per phase. Find the value of
the neutral current in polar form.
Transcribed Image Text:A three-phase source has a phase sequence of EAS- Esc-ECA and delivers the following delta load currents: Ib 1220° A, I = 12Z - 60° A. I. = 16260° A. The line voltage EAB is 230Z0° V. If one wattmeter is connected with its current coil in line A and its potential coil across lines A and B, and a second wattmeter is connected with its current coil in line C and its potential coil across lines C and B, what will each wattmeter register, and what is the total power? An abc-sequence, three-phase, 4-wire, 380-V supply is connected to an unbalanced load having phase impedances of: Za = 8 + j6 0, Zb = 8-j6 Q and Zc = 5 Q. Impedance of the neutral wire is 0.5 + j1 Q. Line impedance is 1 + j2 0 per phase. Find the value of the neutral current in polar form.
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