Consider a three-wire Y to Y circuit. The voltages of the source connected to Y are: Va = 240 < 0° V rms 3 240 Vb = <-120° V rms √3 240 Vc = < 120° V rms √3 The load connected to Y is balanced. The impedance of each phase is Z=15/25 (a) Find the phase voltages. (b) Find the line currents and the phase currents. (c) Show the line currents and phase currents on a phasor diagram. (d) Determine the power dissipated in the load.

Consider a three-wire Y to Y circuit. The voltages of the source connected to Y are: Va = 240 < 0° V rms 3 240 Vb = <-120° V rms √3 240 Vc = < 120° V rms √3 The load connected to Y is balanced. The impedance of each phase is Z=15/25 (a) Find the phase voltages. (b) Find the line currents and the phase currents. (c) Show the line currents and phase currents on a phasor diagram. (d) Determine the power dissipated in the load.

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 2.14MCQ: The instantaneous power absorbed by the load in a single-phase ac circuit, for a general R LC load...

See similar textbooks

Similar questions

The phase b voltage and the phase b current of a balance three-phase system are V = 220 sin (wt + 210°) and I = 10 sin (wt-180°). * A. 5256.44 W B. 5514.38 W C. 5715.76 W D. 6049.22 W
7. A two-branch parallel circuit, with Z₁ = 10/0° ohms and Z₂ = 8.0/-30° ohms, has a total current i(t) = 7.07 cos(wt -90°) A. Obtain the complete power triangle. P, Q, p.f. Ohms. 8. A two-branch parallel circuit has branch impedances Z₁ = 2.0-j5.0 ohms and Z₂ = 1.0+ j1.0 ohms. Obtain the complete power triangle for the circuit if the 2.00hm resistor consumes 20W. P, Q, p.f. 9. A two-branch parallel circuit, with impedances Z₁ = 4.0/-30° and Z₂ = 5.0/60° ohms, has an applied effective voltage of 20 V. Obtain the power triangles for the branches and combine them to obtain the total power triangle.
All
Part d,e,f
The admittance of a circuit is (0.03-j0.04) Siemens. Find the value of resistance and inductive reactance of the circuit if they are joined a)in series and b) in parallel.
In a balanced Y-Y circuit shown in Figure 5, the magnitude of the phase voltage at the source is Vp = 2520 V (rms) and Van = 252020° V (rms). The load impedance is Zy = 135 + j55 Q per phase and the wire impedance is Zw=85 + j65 per phase. All the voltages and currents are in rms in this problem. (a) Find the phasors for line currents IA, IB, Ic in rms. (b) Find the load voltage VAN = IAZY. Also find VBN, and VCN. (c) Find the line voltages VAB, VBC, VCA at the load. (d) Find the complex power SL of the load. ZW ZY Van a A IA ZW ZY Vbn b В IB N ZW ZY Vcn IC Figure 5
A balanced load is connected in star across a 3 phasec415V 50Hz supply. The load consists of a coil of resistance 25 ohms and inducrance 0.5 henry in paeallel with a purw resistance of 28 ohms and a pure capaciror of 60microfarads capacitance ,in each branch. Calculate a. The line currents? Need full working and answer has to be 9.3A Formola for inductance XL= 2×3.142FL FORMOLA FOR CAPACITOR XC= 1/2×3.142×FC
Show solutions.
find IL and IC.
Q3 (a) In Figure Q3(a), the load impedance, Zi is adjusted until it absorbs the maximum average power. (i) Determine ZL (ii) Determine the maximum average power, Pmax -j42 j10 2 elll 4) 6 A ZL Figure Q3(a) ww ww
Two impedances are connected in parallel to the supply, the first takes a current of 40 A at a lagging phase angle of 30°, and the second a current of 30 A at a leading phase angle of 45°. Draw a phasor diagram to scale to represent the supply voltage and these currents. From this diagram, by construction, determine the total current taken from the supply and its phase angle.
All