Given the three phase circuit illustrated below. Two balanced loads and the capacitors areconnceted to a 50 Hz balanced three phase line. The line to line voltage at the load is 500 Volts(rms). The line impedances are Zı=1.25+j1.25 2 per phase.V,500 VoltZ-1.25+jl.25 2200C=" (µF)LOAD 15 kWpf=1.0LOAD 215 kWpf=0.707 (lag)b) Calculate the line-to-line voltage Vs at the source.c) Calculate the power factor seen from the source.

In the power system Calculate line to line voltage Vs Find the power factor of the source

Given the three phase circuit illustrated below. Two balanced loads and the capacitors are connceted to a 50 Hz balanced three phase line. The line to line voltage at the load is 500 Volts (rms). The line impedances are Zı=1.25+jl.25 2 per phase. v, 500 Volt Z-1.25+jl.25 Q 200 C= LOAD 1 5 kW pf=1.0 LOAD 2 IS kW pf-0.707 (lag) b) Calculate the line-to-line voltage Vs at the source. c) Calculate the power factor seen from the source.

Given the three phase circuit illustrated below. Two balanced loads and the capacitors are connceted to a 50 Hz balanced three phase line. The line to line voltage at the load is 500 Volts (rms). The line impedances are Zı=1.25+jl.25 2 per phase. v, 500 Volt Z-1.25+jl.25 Q 200 C= LOAD 1 5 kW pf=1.0 LOAD 2 IS kW pf-0.707 (lag) b) Calculate the line-to-line voltage Vs at the source. c) Calculate the power factor seen from the source.

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...

See similar textbooks

Similar questions

An impedance (inductive) ZL = (11.5 + j10) ohms is connected in parallel with an impedance (capacitive) ZC = (8 – j20) ohms. Calculate (a) the conductance and susceptance of each branch; (b) the total conductance, susceptance, andadmittance of the circuit; (c) the current in each branch, and the total current and power factor, if the impressed emf is 120 volts. draw the circuit diagram
Calculate the real and reactive powers of the load between terminals a and b in the given figure. Assume f = 60 Hz, V∼S�∼� = 70∠0 V rms, RS = 2 ohm, Ro = 26 ohm, and XL = 5 ohm. The real and reactive powers are _______W and _________VAR.
•••PF improved by 100% Convert the given load of the circuit shown into impedance bulk by using power triangle; f= 60hz. Measure the line current IL, power loss PL0, power source Ps, voltage source VS; take note of the old value of PFL; Notations IL= line current; PL0= power loss; PS= power source; VS= voltage source; PFnew= New power factor after correction; PFold= old power factor before correction
A three phase 60 Hz transmission line delivers 750 KW at 95% leading power factor and at delta voltage of 6,900 volts. The resistance per conductor is 4.3 ohms and the reactance per conductor is 2.6 ohms. Assuming both source and load are wye connected, what is the load impedance per phase? A. 69 ohms B. 64.5 ohms C. 72.2 ohms D. 60.27 ohms
For an AC power distribution circuit, the line voltage is 480V and the line current is 53A. The circuit is balanced Wye or star connected. a. What is the phase voltage measured to the neutral leg?b. What is the phase current for each leg?c. What is the total apparent power drawn by the circuit?d. What is the total apparent power drawn by each phase of the circuit?e. If the circuit has a Power Factor of 85%, what is the total real power drawn from the circuit?
The phase currents in a four-wire wye-connected load, such as that shown in the given figure, are as follows I˜an=36 �~��=36 A rms, I˜bn=�~��= 24 ∠2π/3 A rms, and I˜cn=�~��= 29 ∠π/4 A rms. Determine the current in the neutral wire. The current in the neutral wire is ______ ∠ ________ ° A rms
In the circuit of figure shown in the next slide, three impedances are 12 – j10 ohms, 10 + j20 ohms, and 15 + j0 ohms, connected between conductors a, b, c and the neutral “n” of a balanced 230 volts, 60 hertz, 3 phase, 4 wire, ABC system. Using Van as the reference vector, determine:a. Current in each impedanceb. Neutral current Inc. Readings of wattmeters W1, W2, & W3d. Power in each impedance
ANSWER IN POLAR FORM AND 2 DECIMAL In the circuit shown in Figure 1, a load having an impedance of 37 + j26 Ω is fed from a voltage source through a line having an impedance of 1 + j7 Ω. The effective, or rms, value of the source voltage is 250 V. a. Calculate the load current IL and the voltage VL (current and voltage at the load) 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
Question oneA balanced star connected load comprises of 20 ohm resistance and 0.07 Henry inductance in each branch. If the load supplied with 415V at 50Hz, calculatea) the line currentb) the power factorc) the total power supplied to the load PLEASE FOLLOW THIS APPROACH TO SOLVE THE QUESTION. THANK YOUStep OneDeduce the inductive reactance.STEP TwoWrite down a rectangular expression for the impedance per branch.STEP ThreeConvert the rectangular expression into polar expression.STEP FourBecause impedance will be involved in the analysis deduce the phase voltage.STEP FiveSolve for the phase current and hence the line current.STEPVSixUse the phase angle of the current to deduce the power factor. STEP SevenFind the apparent power.
PLS USE 4 DECIMAL PLACES FOR THE FINAL ANSWERS An inductive reactance of 10 ohms is connected in parallel with the capacitive reactance of 30 ohms. If the combination is connected in series with a 10 ohm resistance. The given voltage is 200V. *What is the total real power of the system in magnitude with unit of kW? *What is the total real power of the system in magnitude with unit of kVAR? *What is the total impedance in polar form in ohms? *What is the total real power of the system in magnitude with unit of kVA? *What is the total current in polar form in A?
Three loads connected in parallel across a 1000-V (RMS), 60-Hz single-phase source.Load 1: Inductive load, 125 kVA, 0.28PF laggingLoad 2: Capacitive load, 10 kW, 40 kVARLoad 3: Resistive load, 15 kWa) Determine the total kW, kvar, kva, and supply power factor.b) In order to improve the power factor to 0.8 lagging, a capacitor of negligible resistance isconnected in parallel with the above loads. Find the KVAR rating of that capacitor and thecapacitance in μf .c) Comment on the magnitude of the supply current after adding the capacitor
A 4200-V, three-phase transmission line has an impedance of 4+j ohms per phase. If it supplies a load of 1 MVA at 0.75 power factor, find: (a) the complex power (b) the power loss in the line (c) the voltage at the sending end. *Ans. S=0.75+j0.66 MVA, PL=25.14 kW and VS=4.492∠ − 1.912°kV Use four decimal places.