*43. The Y-Y system of Fig. 22.48 has a balanced load and a line impedance Zine=42+j 2002. If the line voltage at the generator is 16,000 V and the total power delivered to the load is 1200 kW at 80 A, determine each of the fol- lowing: a. The magnitude of each phase voltage of the generator. b. The magnitude of the line currents. c. The total power delivered by the source. d. The power factor angle of the entire load "seen" by the source. e. The magnitude and angle of the current Lif EAN= EAN 20°. f. The magnitude and angle of the phase voltage V g. The impedance of the load of each phase in rectangu- lar coordinates. h. The difference between the power factor of the load and the power factor of the entire system (including Zline). i. The efficiency of the system. + EAN B www moo 402 2002 E = 16 kV 402 2002 ww 000 ww voo 40 2002 FIG. 22.48 Problem 43. SECTION 22.11 The Three-Wattmeter Method 44. a. Sketch the connections required to measure the total watts delivered to the load of Fig. 22.39 using three wattmeters. b. Determine the total wattage dissipation and the read- ing of each wattmeter. 45. Repeat Problem 44 for the network of Fig. 22.42. SECTION 22.12 The Two-Wattmeter Method 46. a. For the three-wire system of Fig. 22.49, properly con- nect a second wattmeter so that the two will measure the total power delivered to the load. b. If one wattmeter has a reading of 200 W and the other a reading of 85 W, what is the total dissipation in watts if the total power factor is 0.8 leading? c. Repeat part (b) if the total power factor is 0.2 lagging AM 12 0 Z₁ voo CC PC Wattmeter. +7= 80 A 12 Z₁ = Z₂ = Z lagging F moo Za b A or Y connected load
*43. The Y-Y system of Fig. 22.48 has a balanced load and a line impedance Zine=42+j 2002. If the line voltage at the generator is 16,000 V and the total power delivered to the load is 1200 kW at 80 A, determine each of the fol- lowing: a. The magnitude of each phase voltage of the generator. b. The magnitude of the line currents. c. The total power delivered by the source. d. The power factor angle of the entire load "seen" by the source. e. The magnitude and angle of the current Lif EAN= EAN 20°. f. The magnitude and angle of the phase voltage V g. The impedance of the load of each phase in rectangu- lar coordinates. h. The difference between the power factor of the load and the power factor of the entire system (including Zline). i. The efficiency of the system. + EAN B www moo 402 2002 E = 16 kV 402 2002 ww 000 ww voo 40 2002 FIG. 22.48 Problem 43. SECTION 22.11 The Three-Wattmeter Method 44. a. Sketch the connections required to measure the total watts delivered to the load of Fig. 22.39 using three wattmeters. b. Determine the total wattage dissipation and the read- ing of each wattmeter. 45. Repeat Problem 44 for the network of Fig. 22.42. SECTION 22.12 The Two-Wattmeter Method 46. a. For the three-wire system of Fig. 22.49, properly con- nect a second wattmeter so that the two will measure the total power delivered to the load. b. If one wattmeter has a reading of 200 W and the other a reading of 85 W, what is the total dissipation in watts if the total power factor is 0.8 leading? c. Repeat part (b) if the total power factor is 0.2 lagging AM 12 0 Z₁ voo CC PC Wattmeter. +7= 80 A 12 Z₁ = Z₂ = Z lagging F moo Za b A or Y connected load
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 2.16P: A single-phase, 120V(rms),60Hz source supplies power to a series R-L circuit consisting of R=10 and...
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Question
Solve 43 and please solve all subparts
Transcribed Image Text:*43. The Y-Y system of Fig. 22.48 has a balanced load and a
line impedance Zline = 4 N + j 20 N. If the line voltage
at the generator is 16,000 V and the total power delivered
to the load is 1200 kW at 80 A, determine each of the fol-
lowing:
a. The magnitude of each phase voltage of the generator.
b. The magnitude of the line currents.
c. The total power delivered by the source.
d. The power factor angle of the entire load "seen" by
the source.
e. The magnitude and angle of the current La if EAN =
EAN 40°.
f. The magnitude and angle of the phase voltage V
g. The impedance of the load of each phase in rectangu-
lar coordinates.
h. The difference between the power factor of the load
and the power factor of the entire system (including
Zling).
i. The efficiency of the system.
EAN
A
ooo
M voo
40
2002
EAR 16 kV
40 2002
www 000
ww voo
40
2002
SECTION 22.11 The Three-Wattmeter Method
44. a. Sketch the connections required to measure the total
watts delivered to the load of Fig. 22.39 using three
wattmeters.
b. Determine the total wattage dissipation and the read-
ing of each wattmeter.
45. Repeat Problem 44 for the network of Fig. 22.42.
SECTION 22.12 The Two-Wattmeter Method
46. a. For the three-wire system of Fig. 22.49, properly con-
nect a second wattmeter so that the two will measure
the total power delivered to the load.
b. If one wattmeter has a reading of 200 W and the other
a reading of 85 W, what is the total dissipation in watts
if the total power factor is 0.8 leading?
c. Repeat part (b) if the total power factor is 0.2 lagging
voltage of 208 and a total power consumption of
at a leading power factor of 0.6. Find the imped
each phase in rectangular coordinates.
*42. Find the total watts, volt-amperes reactive, volt-a
and F, of the system of Fig. 22.47.
FIG. 22.48
Problem 43.
EAR 125 V 2.0°
E = 125 V + 120°
Esc125 V-120°
+
m
CC
Va Z₁
PC
Wattmeter
2002
FIG. 22.47
Problem 42.
Ln
150
+= 80 A
www
152
20
40
Z₁ = Z₂ = Z
220 £2
lagging F
402
40 Z
moo
2002
PROBLEMS III
W
A or Y
connected.
load
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