A three phase load is connected to three phase supply of 173.205) 50 Hz. The phase impedances of Y and B are 20 ohms capacitive reactance and 20 ohms inductive reactance respectively. Assume RBY phase sequence. Calculate the value of R phase (pure resistive resistance if the neutral current is zero Amps. Draw the current and voltage phasors. Also calculate the total reactive power.

A three phase load is connected to three phase supply of 173.205) 50 Hz. The phase impedances of Y and B are 20 ohms capacitive reactance and 20 ohms inductive reactance respectively. Assume RBY phase sequence. Calculate the value of R phase (pure resistive resistance if the neutral current is zero Amps. Draw the current and voltage phasors. Also calculate the total reactive power.

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

A single phase AC chopper supplies a pure inductive load of 0.02H from 220V, 50HZ AC supply. The triggering angle of the thyristors is 100°. (Assume the circuit is ideal.) a. Sketch the circuit b. Develop the load current expression and find the decay angle of the load current c. Sketch the load voltage and load current waveforms d. Calculate the RMS value of load voltage e. Calculate the RMS value of load current f. If the triggering angle of the thyristors is chosen as 60°. Explain the operation of the circuit.
Two three-phase alternators operate in parallel and the excitation is such that theinduced emfs are 1 kV/ph. The load admittance is (0,427 – j0,214) S. Theadmittance/phase of the machines are (0,0262 – j0,499) S and (0,0218 – j0,312) Srespectively. The emf of B leads A by 10°e. Calculate:(a) the terminal voltage(b) the current supplied by A(c) the power factor of B
Use the information below to answer questions 24 und 25. The voltage across and the current through a load are (10+ j5Y and (2-jiArespecively. 24. What is the reactive power in VArconsumed? D. 0 A. 15 C. 20 D. 25 25. What is the pawer factor of the load? A. 0.8 leading B. 0.8 Jagging. -D. 0.6 ligging C 0.6 leading
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
A load of 40 -j 30 is connected to a source of 100 V with a phase angle of 300, through a transmission line with an inductive reactance of 30 ohms. The total reactive power absorbed by the load is: O A. 187.5 vars O B. 177.5 vars O C. None of choices are correct O D. 184 vars O E. 120 vars
A 50 Hz, Scott connected transformer supplies an unbalanced two phase load at ( 400 V) per phase. For the leading phase the load has a resistance of (13.3 ohm) and capacitor of (318) micro farad in series. For the other phase the load consists of resistance (10) ohm and an inductance of (42.3) mH. Calculate both mathematically and graphically the lines currents on 3- phase side. The main transformer primary to secondary turns ratio is (12/1).
Answer #3 only.
The total reactive power consumed by the three-phase load(in VAr) is??
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
Part a,b,c
Element X shown in the three-phase schematic is a pure reactive element. With this element connected, the generator power factor is unity. Indicate:(a) The three-phase real and reactive power of the generator. b) Indicate if X is an inductor bank or a capacitor bank. c) The three-phase reactive power of element X. d) Indicate the reactance per phase of element X, for a star connection. e) If the frequency is 60 Hz, indicate the physical value of the X element.
Part d,e,f