12.18 If Van220/60° V in the network of Fig. 12.49,find the load phase currents IAB, IBc, and ICA.%3|aAThree-phase,12 2j9 ΩY-connectedgeneratorj9 Q12 Ωb(+) phaseellj9 QВsequence12 ΩCFigure 12.49For Prob. 12.18.wwellell

The given voltage Van=220∠60° V The expression for the line voltage is,…

Answered: 12.18 If Van 220/60° V in the network…

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Electrical Engineering

12.18 If Van 220/60° V in the network of Fig. 12.49, find the load phase currents IAB, IBC, and ICA- %3D

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Q2 (a) Based on the relationship between the line and phase value of currents and voltage, show that the active power input to a three-phase balance load is v3VIcose, where V and I are line quantities. (b) A balanced Y-connected load has phase voltage of 230 V and positive phase sequence. The impedances Za, Za, and Zc are 10230° N, respectively. (i) By taking VaB on the load side as a reference, determine all the line currents and phase voltages and line voltages. (ii) Determine total real power, P, total reactive power, Q and total apparent power, S of the system. (iii) Total real power of the loads can be measured using two wattmeter methods. Draw the connection of the two wattmeters if their current coils are in line A 111 and C, respectively. What is the total real power measured by each wattmeter? Prove and compare the value with Q2(b)(ii).
Q2 (a) Based on the relationship between the line and phase value of currents and voltage, show that the active power input to a three-phase balance load is v3VIcoso, where V and I are line quantities. (b) A balanced Y-connected load has phase voltage of 230 V and positive phase sequence. The impedances Za, ZB, and Zc are 10430° n, respectively. (i) By taking VaB on the load side as a reference, determine all the line currents and phase voltages. (i1) Determine total real power, P, total reactive power, Q and total apparent power, S of the system. (111) Total real power of the loads can be measured using two wattmeter methods. Draw the connection of the two wattmeters if their current coils are in line A and C, respectively. What is the total real power measured by each wattmeter? Prove and compare the value with Q2(b)(i).
Using re model, compute for the AC characteristic of below circuit. a. Zi b. Zo c. Av d. Ai
Question 3. A three-phase impedance load balanced D a connected load in parallel with a balanced ? connected load made of bonding. D each arm for the load ?D = 6 + 6? and ? each arm for the connected load It is given as ?? = 2 + 2?. ? the connected load ?? = 1? is earthed through the neutral impedance. To this impedance load, the symmetrical component voltages ?0 = 10∠60°, ?1 = 100∠0° and ?2 = Unbalanced phase-to-earth voltages ??, ?? and ?? of 15∠200° volts were applied. a) Draw the zero, positive and negative sequence circuits. b) Find the complex powers imparted to each component circuit.
!!! D. TCF 1.SI 19. Which of the following correction factors makes it possible to include the effects of both potential transformers and current transformers in an installation? A. PACF B. FCF C. RCF
A three-phase system has balanced conditions so that the per-phase circuit representation can be used as shown in Figure 1 Select the turns ratio of the step-up and step-down transformers that the system operates with an efficiency greater than 99 percent. Moreover, find the complex power (received or given) of all components in the circuit and the V1 and V2 voltages. The load voltage is specified as 4 kV rms, and the load impedance is 4/3 ohm. ..
A single phase, unity power factor load takes 90 Amps at 10 kV. Using a base voltage of 65 kV and base kilovolt amperes of 4475 kVA. Find the base current, base impedance, base power, per unit current and per unit voltage of the load.
Determine the value of the impedance, Z₁, that causes maximum power transfer in the circuit shown in Figure Qlc. 52 j24n -j12.35n (V₂) j2403 j24n Figure Qle B
2.1 Two power stations, A and B, are synchronized at 66 kV. They are inter-connected by a transmission line with an inductive reactance of 6.7-Ω and resistance of 3.5-Ω per phase. The voltage of power station A is advanced with an angle of 10.5 degrees with respect to the voltage of power station B. The loading of power station B has a real power of 200 MW. The respective loads of the two power stations are as follows:Power station A: 165 MVA at a power factor of 0.819 lagging.Power station B: The reactive power consumed by the load is 155 Mvar. *Round off to two decimal places to every question 18.The final loading of power station B (MVA) and it's angle 19.The reactive power received by power station A if the reactive power loading from power station A is to be reduced by 30% (MVar). 20.The required advancement angle at power station A to achieve the 30% reduction in reactive power loading of power station A (degrees).
1. Given the circuit below, the phase voltages are given by Van = 20040° Vrms. The source impedance is 5 + j7 per phase and the wire impedance is 8 +j10 per phase. Let the load impedance be Zy = 50 ohms. Find: Van Vin Ven a. II, and Ic b. c. VAN, VBN, and VCN, and VAB, VBC, and VCA Z₂ Z₂ Z₂ Zw Zw Zw B C le N
A three-phase feeder supplies two loads A and B at 380 V (Figure 2).Find the impedance of load A of (55 + j89) ohms and that of load B of(90 + j66) ohms. Ordered as currents in phases A that feed the twoloads, and as currents in the delta connected load.
Let the three-phase electrical system be illustrated in Figure . Knowing that its phase sequence is ABC and that Vcb=380∠135°V, determine the following: a) The value of the line currents demanded by each of the loads and supplied by the source. b) The power and power factor of each load and source. c) The power of the capacitor bank that must be installed to correct the power factor to 0.95 lagging. d) The currents supplied by the source after installing the capacitor bank. e) The percentage reduction of the total apparent power supplied by the source after installing the capacitor bank.