3- The single phase loads in the circuit can be described as follows: Load_1 absorbs an average power of 8-kW at a leading power factor of 0.8, Load_2 absorbs 20-kVA lagging power factor of 0.6, Load_3 absorbs 12-kVAr lagging power factor of 0.85. a) Determine the power factor of the three loads in parallel. b) Determine the apparent power required to supply the loads, the magnitude of the current, Is, and the average power loss in the transmission line. c) Determine the amplitude of source voltage Vs. 0.052 jo.502 12 Is Vs 250LO'Vms L1 L2 L3

3- The single phase loads in the circuit can be described as follows: Load_1 absorbs an average power of 8-kW at a leading power factor of 0.8, Load_2 absorbs 20-kVA lagging power factor of 0.6, Load_3 absorbs 12-kVAr lagging power factor of 0.85. a) Determine the power factor of the three loads in parallel. b) Determine the apparent power required to supply the loads, the magnitude of the current, Is, and the average power loss in the transmission line. c) Determine the amplitude of source voltage Vs. 0.052 jo.502 12 Is Vs 250LO'Vms L1 L2 L3

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.12P: The voltage v(t)=359.3cos(t)volts is applied to a load consisting of a 10 resistor in parallel with...

See similar textbooks

Similar questions

A balanced -connected impedance load with (12+j9) per phase is supplied by a balanced three-phase 60-Hz,208-V source, (a) Calculate the line current, the total real and reactive power absorbed by the load, the load power factor, and the apparent load power, (b) Sketch a phasor diagram showing the line currents, the line-to-line source voltages, and the -load currents. Use Vab as the reference.
The instantaneous power absorbed by the load in a single-phase ac circuit, for a general R LC load under sinusoidal-steady-state excitation. is (a) Nonzero constant (b) Zero (c) Containing double-frequency components
Let a series RLC network be connected to a source voltage V, drawing a current I. (a) In terms of the load impedance Z=ZZ, find expressions for P and Q, from complex power considerations. (b) Express p(t) in terms of P and Q, by choosing i(t)=2Icost. (c) For the case of Z=R+jL+1/jC, interpret the result of part (b) in terms of P,QL, and Qc. In particular, if 2LC=1, when the inductive and capacitive reactances cancel, comment on what happens.
The voltage v(t)=359.3cos(t)volts is applied to a load consisting of a 10 resistor in parallel with a capacitive reactance XC=25. Calculate (a) the instantaneous power absorbed by the resistor, (b) the instantaneous power absorbed by the capacitor. (c) the real power absorbed by the resistor, (d) the reactive power delivered by the capacitor, and (e) the load power factor.
The instantaneous voltage across a circuit element is v(t)=400sin(t+30)volts, and the instantaneous current entering the positive terminal of the circuit element is i(t)=100cos(t+10)A. For both the current and voltage, determine (a) the maximum value, (b) the rms value, and (C) the phasor expression, using cos(t) as the reference.
2) Figure shows three loads connected in parallel across a 1000-V (rms), 60-Hz single-phase source. Load 1: Inductive load, ... kVA, 0.28 p.f. lagging Load 2: Capacitive load, ... kW, 40 kvar Load 3: Resistive load, 15 kW Determine the total (a) kW, (b) kvar, (c) kva, and (d) supply power factor. (Please determine the power values within the specified limits: Load 1 apparent power: 100-150 kVA, Load 2 active power: 5-20 kW. By considering the power values you determined yourself, solve the question.) Load Load DE 1 2 Load 3
3- The single phase loads in the circuit can be described as follows: Load 1 absorbs an average power of 8-kW at a lagging power factor of 0.8, Load 2 absorbs 20-kVA leading power factor of 0.6, Load 3 absorbs 12-kVAr lagging power factor of 0.85. a) Determine the power factor of the three loads in parallel. b) Determine the apparent power required to supply the loads, the magnitude of the current, Is, and the average power loss in the transmission line. c) Determine the amplitude of source voltage Vs. 0.052 jo.502 12 V, 250LO'Vms L1 L2 L3
Which of the following descriptions IS NOT correct for loads in power systems? A. The purely resistive load absorbs the real power from the power grid B. The purely inductive load absorbs the positive reactive power from the power grid C. The purely capacitive load absorbs the positive reactive power from the power grid. D. The average value of the instantaneous power through loads is equal to its real power. In an ac circuit, power factor correction or improvement is achieved by A. Connecting a resistor in parallel with the inductive load B. Connecting an inductor in parallel with the inductive load C. Connecting a capacitor in parallel with the inductive load A balanced delta-load can be converted to an cquivalent balanced wye- load by dividing the delta-load impedance by A. square root of 3 В.3 C. 1/3
Given: 1. 2 wye-connected loads per phase to a 3 phase power source 2. first load consists of a 55ohm resistance and a 0.05H inductance per phase 3. second load consumes 1kW and power factor of 0.7 lagging per phase 4. RMS of voltage across the loads are 220V, frequency 120Hz per phase 5. single phase equivalent is shown in the figure: Question: Give the value of reactive power per phase seen at load 2.
Given: 1. 2 wye-connected loads per phase to a 3 phase power source 2. first load consists of a 55ohm resistance and a 0.05H inductance per phase 3. second load consumes 1kW and power factor of 0.7 lagging per phase 4. RMS of voltage across the loads are 220V, frequency 120Hz per phase 5. single phase equivalent is shown in the figure: Question: What are the real, reactive, and apparent powers seen at load 1? Give also the power factor.
There is an installation with two equal triphasic loads of 300 kVA each and a power factor of 0.9 lagging. When connecting a pure reactive element in parallel, the reactive power at the entrance of the installation is 150 kVARS, with a lagging power factor. We can say that: a) A bank of reactors was connected and the fp deteriorated. b) A capacitor bank was connected and the pf deteriorated. c) A bank of reactors was connected and the fp improved. d) A capacitor bank was connected and the pf improved. e) None of the above
The total power drawn by the two-impedance load in parallel is 26kW at 0.98 power factor lagging, it is being supplied by a 230-volts AC source. One of the loads (Load 1) takes 16kVA at 0.77 power factor lagging. What is the reactive power of the unknown impedance (Load 2)?