Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
9th Edition
ISBN: 9781259989452
Author: Hayt
Publisher: Mcgraw Hill Publishers
expand_more
expand_more
format_list_bulleted
Question
Chapter 12, Problem 26E
(a)
To determine
The line current for the given condition.
(b)
To determine
The phase impedance for the given condition.
(c)
To determine
The new power factor and the new power delivered to the load for the given condition.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
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)
Please 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
False
Three Impedances each of (8 - j24)2 are
connected in mesh across a three-phase
420V ac supply. Determine the phase
current, line current, active power, reactive
power drawn from supply. Also draw the
Phasor diagram for the mesh connection and
marks the Line current ,phase current line
voltage and phase angle between phase
current and pahse voltage.
phase current (Ip)
Line current
real power
reactive power
Chapter 12 Solutions
Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
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
Similar questions
- There is an installation with two identical three-phase motors, 50 HP each and a power factor of 0.9 behind. When connecting a pure reactive element in parallel, the reactive power at the installation input is 50 kVARS, with a lagging power factor. We can say that: a) A capacitor bank was connected and the pf improved. b) A bank of inductors was connected and the pf improved. c) A capacitor bank was connected and the pf deteriorated. d) A bank of inductors was connected and the pf deteriorated. e) None of the above.arrow_forwardA 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.arrow_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
- A 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_forwardA single phase circuit has an apparent power of 5 kVA and a reactive power of 4 kVAr. Then find (i) power factor (ii) active power (iii) resistance of the circuit when the applied voltage is 200 V.arrow_forwardThree impedances (4-j6) ohm, (6+j8) ohm, and (5-j3) ohms are connected in parallel. Calculate the current in each branch when the total supply current is 20 A. Please provide its solution...its urgently needed...please.arrow_forward
- 1. Find the current and voltages Vr,Vl and Vc in phasor form. 2. Verify the kirchoffs volatage law around the closed loop. 3. Find the power factor of the circuit and indicate whether it os leading or laggingarrow_forward1. What is the main direct cause of reactive power in AC system? A. Resistance of transmission lines B. Inductance and capacitance in the loads C. Ideal transformer connected in the system D. Power produced by generator 2. "Reactive power in a system is dissipated generally as thermal energy?" A. TRUE B. FALSE 3. Which of the following statements are correct for three phase circuit: A. Sum of all the three phase currents is zero in unbalanced network B. Total power transfer to load is constant with time C. Neutral conductor is same size in terms of material used as in single phase conductors D. Net apparent power consumed is equal to real powerarrow_forwardThree Impedances each of (12 – j20)Q are connected in mesh across a three-phase 415V ac supply. Determine the phase current, line current, active power, reactive power drawn from supply. Also draw the Phasor diagram for the mesh connection and marks the Line current ,phase current line voltage and phase angle between phase current and pahse voltage phase current (Ip) Line current real power reactive powerarrow_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_forwardIn a balanced delta connected 3-phase circuit, has resistance 25 ohm and inductive reactance 40 ohm, connected to a 400V,50HZ 3-phase supply voltage, then total power delivered to load is Select one: O a. 5397.76W O b. 7593.26W O c. NONE OF THESE O d. 1635.34KWarrow_forwardIn 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 Falsearrow_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