Engineering Circuit Analysis
9th Edition
ISBN: 9780073545516
Author: Hayt, William H. (william Hart), Jr, Kemmerly, Jack E. (jack Ellsworth), Durbin, Steven M.
Publisher: Mcgraw-hill Education,
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 12, Problem 27E
(a)
To determine
The phase current for the given condition.
(b)
To determine
The line current for the given condition.
(c)
To determine
The line voltage for the given condition.
(d)
To determine
The power factor at which source operates for the given condition.
(e)
To determine
The total power delivered to the load for the given condition.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A resistance of 20 Ω, an inductance of 0.2H and a capacitance of 100μF are connected in series across 220-V 50 Hz mains. Determine the following: a) impedance b) current c) voltage across R, L, and C d) power in watts and VA e) power factor and angle of lag.
In a R-C parallel circuit, total current is out of phase with the applied voltage."
True
False
In a R-C parallel circuit, total current is out of phase with the applied voltage."
True
False
In parallel-connected ac circuit, the value of the equivalent admittance of the circuit is equal to the phasor sum of the reciprocal of the individual admittances. "
True
False
A balanced delta-connected load is supplied by a 60 Hz
3-phase source with a line voltage of 240 V. Each load
phase draws 6kW at a lagging power factor of 0.8.
Calculate:
a. The load impedance per phase
b. The line current
c. The value of the capacitance needed to be
connected in parallel with each load to minimize
the current from the source (PF=1)
Chapter 12 Solutions
Engineering Circuit Analysis
Ch. 12.1 - Let and . Find (a) Vad; (b) Vbc; (c) Vcd.Ch. 12.2 - Prob. 2PCh. 12.2 - Modify Fig. 12.9 by adding a 1.5 resistance to...Ch. 12.3 - A balanced three-phase three-wire system has a...Ch. 12.3 - A balanced three-phase three-wire system has a...Ch. 12.3 - Three balanced Y-connected loads are installed on...Ch. 12.4 - Each phase of a balanced three-phase -connected...Ch. 12.4 - Prob. 8PCh. 12.5 - Determine the wattmeter reading in Fig. 12.24,...Ch. 12.5 - Prob. 10P
Ch. 12 - Prob. 1ECh. 12 - Prob. 2ECh. 12 - Prob. 3ECh. 12 - Describe what is meant by a polyphase source,...Ch. 12 - Prob. 5ECh. 12 - Prob. 6ECh. 12 - Prob. 7ECh. 12 - Prob. 8ECh. 12 - Prob. 9ECh. 12 - Prob. 10ECh. 12 - The single-phase three-wire system of Fig. 12.31...Ch. 12 - Prob. 12ECh. 12 - Referring to the balanced load represented in Fig....Ch. 12 - Prob. 14ECh. 12 - Prob. 15ECh. 12 - Consider a simple positive phase sequence,...Ch. 12 - Assume the system shown in Fig. 12.34 is balanced,...Ch. 12 - Repeat Exercise 17 with Rw = 10 , and verify your...Ch. 12 - Prob. 19ECh. 12 - Prob. 20ECh. 12 - Prob. 21ECh. 12 - Prob. 22ECh. 12 - A three-phase system is constructed from a...Ch. 12 - Prob. 24ECh. 12 - Each load in the circuit of Fig. 12.34 is composed...Ch. 12 - Prob. 26ECh. 12 - Prob. 27ECh. 12 - A three-phase load is to be powered by a...Ch. 12 - For the two situations described in Exercise 28,...Ch. 12 - Prob. 30ECh. 12 - Prob. 31ECh. 12 - Prob. 32ECh. 12 - Repeat Exercise 32 if Rw = 1 . Verify your...Ch. 12 - Prob. 34ECh. 12 - Prob. 35ECh. 12 - Prob. 36ECh. 12 - A wattmeter is connected into the circuit of Fig....Ch. 12 - Find the reading of the wattmeter connected in the...Ch. 12 - (a) Find both wattmeter readings in Fig. 12.39 if...Ch. 12 - Circuit values for Fig. 12.40 are , , , , . Find...Ch. 12 - Prob. 41ECh. 12 - Prob. 42ECh. 12 - (a) Is the load represented in Fig. 12.41...Ch. 12 - Prob. 44E
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
- A single-phase, 60-Hz supply is connected to a load consisting of a 100 Ω resistor in parallel with a 50-µF capacitor. Find the source power factor. (Make sure to indicate leading or lagging PF)arrow_forwardA load of 120 + j 60 is connected to a source of 120 V with a phase angle of 300, through a transmission line with an inductive reactance of 60 ohms. A Capacitor bank of a capacitive reactance of 60 ohms is connected in parallel to the load. The power system has a net: O A. surplus of 480 vars O B. surplus of 960 vars O C. shortage of 480 vars O D. shortage of 960 vars O E. None of choices are correctarrow_forward5. The figure below shows two star connected loads with three phase power. The voltage source is 120Z0°. The loads are Z₁ = 10 + j4 № and Z₂ = 2 +j3 №. The cables are negligible. Calculate: a) the line and phase current. b) the real power from the source. c) the reactive power of the circuit. Is V N Z₁ Z₁ Z₁ Z₂ Z₂ N N Z₂arrow_forward
- ChatGPT 3.5 You A balanced load is connected in star across a 3 phase 415V 50Hz supply. The load consists of a coil of resistance 25 ohms and inductance 0.5 henry in parallel with a pure resistance of 28 ohms and a pure capacitor of 60 microfarads capacitance ib each branch Calculate I. The line currents Ii. The overall power factor. iii. The power delivered from the supply. iv. The power dissipated in the resistors and coils. v. The current in the neutral supported by a reason why its value is that deduced ?arrow_forwardProblem #4: A company needs to improve its power factor to 0.95 lagging by connecting a 3-phase capacitor bank at a 3-phase motor drawing 50 kVA at 0.85 power factor lagging from a 230-V source. Find the required KVAR rating of the capacitor bank, the line current before and after the capacitors are added.arrow_forwardA load of 240 +j 120 is connected to a source of 240 V with a phase angle of 300, through a transmission line with an inductive reactance of 60 ohms. A Capacitor bank of a capacitive reactance of 120 ohms is connected in parallel to the load. The power system has a net: O A. surplus of 1440 vars O B. None of choices are correct O C. shortage of 480 vars O D. shortage of 960 vars O E. surplus of 480 varsarrow_forward
- 1. (a) (b) (ii) (iii) (iv) A 400 V, 50 Hz three-phase star-connected generator supplies a delta-connected load. The load consists of a resistance of 30 Q and an 80 µF capacitor in series. Calculate: The phase impedance of the load and the power factor. The phase and line currents. The total real and apparent powers of the load. Draw the complete phasor diagram of the load. The voltages of an unbalanced three-phase supply are: Va = 150 0° Vb = 86.6 -90° VCA = 86.690° ase Apply the symmetrical components method to the above unbalanced system and derive the symmetrical components of Va, Vb and Vc. Draw a phasor diagram of the symmetrical components. Discuss the limitations of the method. (arrow_forwardPlease answer quickly "In series-connected ac circuit, the total voltage across the circuit is always equal to the sum of the magnitude (only) of the individual voltage across each element." True False The power factor is equal to cosine of the phase difference. True False A leading power factor means that the circuit is predominantly capacitive in nature. True False "Since most loads are resistive in nature (e.g. motors), improvement of power factor is done by connecting capacitor banks or a synchronous condenser " True Falsearrow_forwardA 200 V single phase circuit has an apparent power of 5 KVA and reactive power of 4 KVAr. Then find (i) power factor (ii) impedance (iii) resistance (iv) reactance.arrow_forward
- 1. For the circuit of Figure 1, a load having an impedance of 28+j16N is fed from a voltage source through a line having an impedance of 2+J4N. The effective or rms value of the source voltage is 220V. (a) Calculate the load current IL and voltage VL. (b) Calculate the average and reactive power delivered to the load. (c) Calculate the average and reactive power delivered to the line. (d) Calculate the average and reactive power supplied by the source. 20 j40 280 220/0 V (rms) j16n Source - -Line- -Load Figure 1arrow_forwardGiven the phasor diagram as shown below, determine: a) The phase angle b) The voltages across Resistances and Reactances. c) The impedance d) The true power e) The instantaneous current and voltage equation. f) Draw the circuit +j 5N 0.8A 32arrow_forwardс Example: Delta-connected load consists of 10-Ohm resistance in series with 20-mH inductance. Source is Y-connected, abc sequence, 120-V rms, 60Hz. Determine laa, Ibb, Icc, lab, Ibc and ICA if: Van = 120/30°(V)rms Vcn a Van Vbn b IaA IbB I cc B IAB N IBC Z A ICA Carrow_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
How do Electric Transmission Lines Work?; Author: Practical Engineering;https://www.youtube.com/watch?v=qjY31x0m3d8;License: Standard Youtube License