Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 20, Problem 20P
The loading of a factory on a 1000 V, 60 Hz system includes:
20 kW heating (unity power factor)
10 kW (Pi) induction motors (0.7 lagging power factor)
5 kW lighting (0.85 lagging power factor)
a. Establish the power triangle for the total loading on the supply.
b. Determine the power-factor capacitor required to raise the power factor to unity.
c. Determine the change in supply current from the uncompensated to the compensated system.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
6. Analyzing an AC power outlet:
a. Identify the common names for measurements 1, 2, 3, and 4 for this voltage trace.
In a country using 220 VAC as standard, what is the peak-to-peak voltage?
b.
C.
A single-phase induction motor draws 4 Amps rms when operating in the country above. What is the
apparent power usage? Please note the units.
û
0
-û-
3
1
V
4
Alternator A (100 kVA, 3-f, 240 V, 60 Hz, 1800 rpm) is operating in parallel with alternator B (125 kVA, 3-f, 240 V, 60 Hz, 1800 rpm). The load of alternator A is 70 kW at 85% pf leading and the load of alternator B is 85 kW at 75% pf leading. Determine the pf of load.
a) A sinewave is having a frequency of 50 Hz and instantaneous value of 100 Volts at 1.3 milli seconds. Find
i) The maximum value of sinusoidal voltage waveform and
ii) The value of voltage at 2.1 milli seconds.
b) Determine the instantaneous equation for the voltage waveform shown in figure, if Vp=100 Volts, Time period is 5 milli seconds and O =50 degrees.
Vp
Ф
Chapter 20 Solutions
Introductory Circuit Analysis (13th Edition)
Ch. 20 - For the battery of bulbs (purely resistive)...Ch. 20 - For the network of Fig. 20.49 : a. Find the...Ch. 20 - For the network of Fig. 20.50 : a. Determine the...Ch. 20 - For the system of Fig. 20.51 : a. Find the total...Ch. 20 - For the system of Fig. 20.52 : a. Find PT, QT. and...Ch. 20 - 6. For the system of Fig. 20.53 : a. Find PT, QT....Ch. 20 - For the network of Fig. 20.54 : a. Find the type...Ch. 20 - For the circuit of Fig. 20.55: a. Find the...Ch. 20 - For the network of Fig. 20.56 : a. Find Is. b....Ch. 20 - Repeat Problem 9 for the network of Fig. 20.57.
Ch. 20 - For the network of Fig. 20.58: a. Find the average...Ch. 20 - An electrical system is rated 10 kVA, 200 V at a...Ch. 20 - An electrical system is rated 5 kVA, 120 V, at a...Ch. 20 - For the system of Fig. 20.59: a. Find the total...Ch. 20 - Repeat Problem 14 for the system of Fig. 20.60.Ch. 20 - For the circuit of Fig. 20.61: Find the total...Ch. 20 - For the circuit of Fig. 20.62: Find the total...Ch. 20 - Prob. 18PCh. 20 - The load on a 120 V, 60 Hz supply is 5 kW...Ch. 20 - The loading of a factory on a 1000 V, 60 Hz system...Ch. 20 - a. A wattmeter is connected with its current coil...Ch. 20 - The voltage source in Fig. 20.64 delivers 660 VA...Ch. 20 - a. An air-core coil is connected to a 200 V, 60 Hz...Ch. 20 - a. The inductance of an air-core coil is 0.08 H....Ch. 20 - Using PSpice or Multisim, obtain a plot of...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- The speed of a 100 MW alternator drops by 4% from no load to full load. (a) Find the speed regulation R of the alternator. (b) If frequency drops by 0.1 Hz, find change in power output.arrow_forwardFor a power station the yearly load duration curve is a straight line from 40,000 to 3000 kw. Tomeet the load three turbogenerators are installed. The capacity of two generators is 16,000 kweach and the 3rd is rated at 6,000 kw. Draw the annual load duration curve and determine the following the Energy generated per year, Load factor and Annual Capacity factorarrow_forwardFor a power station the yearly load duration curve is a straight line from 32,000 to 3000 kw. To meet the load three turbo-generators are installed. The capacity of two generators is 16,000 kw each and the 3rd is rated at 4,000 kw. a. Draw the yearly duration curve b. Determine the load factor, annual capacity factor, and maximum demandarrow_forward
- For a power station the yearly load duration curve is a straight line from 50,000 to 4000 kw. To meet the load three turbogenerators are installed. The capacity of two generators is 20,000 kw each and the 3rd is rated at 7,000 kw. a. Draw the annual load duration curve b. Determine the following the Energy generated per year, Load factor and Annual Capacity factor.arrow_forwarda) A sinewave is having a frequency of 100 Hz and instantaneous value of 150 Volts at 1.4 milli seconds. Find i) The maximum value of sinusoidal voltage waveform and ii) The value of voltage at 1.8 milli seconds. b) Determine the instantaneous equation for the voltage waveform shown in figure, if Vp=100 Volts, Time period is 10 milli seconds and o =30 degrees. Vp t= 0 Upload your Answers steps in the "Final Answer Submission" Link provided in the Moodle. a) (i) Maximum value = a) (ii) Value of voltage at 1.8 ms b) Angular frequency =arrow_forwarda) A sinewave is having a frequency of 50 Hz and instantaneous value of 150 Volts at 1.2 milli seconds. Find i) The maximum value of sinusoidal voltage waveform and i) The value of voltage at 1.7 milli seconds. b) Determine the instantaneous equation for the voltage waveform shown in figure, if Vp=100 Volts, Time period is 5 milli seconds and 0 =50 degrees. Vp i= 0 Upload your Answers steps in the "Final Answer Submission" Link provided in the Moodle. a) (i) Maximum value = a) (ii) Value of voltage at 1.7 ms b) Angular frequency %3Darrow_forward
- 4. Two 3300 V star-connected alternators running in parallel supply the following loads : 800 kW at unity p.f.; 600 kW at p.f. 0-8 lagging; 400 kW at p.f. 0.707 lagging The armature current of one machine is 150 A at p.f. 0-85 lagging. What is the armature current, output and p.f. of the other machine? [200 A; 1071 kW; 0-937 lagging] guch that the rise inarrow_forward3. A 250 KVA 60 cycle, 440 V, 3 phase, 8 pole altelnator has an ohmic resistance between terminals of 0.038 N. The ratio of effective to ohmic is 1.30. The friction and windage loss is 1900 watts; the core loss corresponding to the resultant field at 0.8 power factor is 3800 watts; the field takes 39 amperes at 125 V. At rated load and 0.8 power factor lagging, determine a) the efficiency b)the horse power input c) the torque on the driving shaft.arrow_forward1.3 A single-phase AC generator feeds a load. The generator may be modeled as an ideal sinusoidal voltage source (Ef volts) in series with an ideal inductance (X 2 ohms) and a small winding resistance (Ra=0.5 ohms). The load draws a current of (IL = 10 amps) with a power factor of 80% lagging at a fixed load voltage (VL 240 volts). The voltages and current just mentioned are all in their rms values. Draw and label the circuit, write down the governing equation(s) and draw an appropriate phasor diagram for this operation. Calculate the angle between phasors Ef and V₁. Neglect the resistance Ra and calculate the power flow from the source to the load by using the formula V₁| |V₂| X12 P = = = sin (8). Compare this value with the load power calculated from V I cos (0).arrow_forward
- The voltage regulation of an alternator having 0.75 leading power factor load, no-load induced emf of 2,400 V and rated terminal voltage of 3,000 V is: 150% -30% -20% 20%arrow_forwarda) A sinewave is having a frequency of 50 Hz and instantaneous value of 150 Volts at 1.4 milli seconds. Find i) The maximum value of sinusoidal voltage waveform and ii) The value of voltage at 1.8 milli seconds. b) Determine the instantaneous equation for the voltage waveform shown in figure, if Vp=200 Volts, Time period is 10 milli seconds and P =30 degrees. Vp Upload your Answers steps in the "Final Answer Submission" Link provided in the Moodle. a) (i) Maximum value = a) (ii) Value of voltage at 1.8 ms = b) Angular frequency Darrow_forward43. A series circuit consisting of a 50-ohm resistor, 0.5-henry inductor and a 100-microfarad capacitor is connected to a 110- volt, 50 cycle source. Calculate the following: a. apparent power b. reactive power C. power factor and power factor anglearrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Power System Analysis and Design (MindTap Course ...Electrical EngineeringISBN:9781305632134Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. SarmaPublisher:Cengage Learning
Power System Analysis and Design (MindTap Course ...
Electrical Engineering
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:Cengage Learning
Why HIGH VOLTAGE DC power Transmission; Author: ElectroBOOM;https://www.youtube.com/watch?v=DFQG9kuXSxg;License: Standard Youtube License