a) The phase currents in a delta - connected three-phase load are as follows: between thered and yellow lines, 60 A at p.f. 0.9 leading; between the yellow and blue lines, 40 A at0.95 p.f lagging; between the blue and red lines, 50 A at p.f. 0.8 lagging. The supplyvoltage is 240 V. Draw a labeled diagram of the circuit and calculate the line currents.Note: Use VRY as the reference phasor.b) The two-wattmeter method is used to measure the total power drawn by the load in 1 (a)above. Wattmeter one has its current coil connected in the yellow line and its voltage coilconnected between the yellow and red lines. Calculate:i. The power measured by each wattmeter.ii. The power factor of the load.

Answered: Image /qna-images/answer/58b6c0f8-b426-4f6a-8f14-289af20c3cb1.jpg

Answered: a) The phase currents in a delta -…

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 2.13MCQ

See similar textbooks

Similar questions

Please help with the solution.
electrical engineering department plzz solve
Hi, Help me with this circuit question
The circuit shows an unbalanced electrical installation powered by a positive sequence symmetrical three-phase network of 380 V compound voltage. The loads are single phase. Load 1 absorbs an active power of 950 W with f.d.p. 0.5 inductive. Load 2 absorbs an active power of 1,140 W with f.d.p. Unit. Load 3 absorbs from the network an active power of 760 W with f.d.p. 0.5 capacitive. Taking the network voltage URN as the phase reference, calculate: a) complex expressions of the line currents IR. Is. and IT
A 20 Ohm resistor is in series with a 30 Ohm Inductive reactance. If they are connected to a 40 Volt a.c. source, what is the phase angle between the voltage across the Inductive reactance, and the supply voltage (in degrees)? **Only give the magnitude. If you believe the current is lagging OR leading, give a positive value for the angle " I
Two impedances Z₁ and Z2 are connected in series to a voltage source with voltage Vs volts. Let V₁ be the voltage across Z₁ and V₂ be the voltage across Z2. Then, the total voltage Vs is divided between V₁ and V2 in proportion to impedance values Z₁ and Z2. O a. True O b. False
The one-line diagram of a three-phase power system is shown in the above figure. The line impedances are in per- unit on a 100-MVA base, and the line admittances are neglected. Use Gauss-Seidel method in Matlab to analyze the system the tolerance of error is 10-3. Then anwser the questions as follows. V, = 1.05200 0.01+ j0.025 300 + j200 MVA 0.015 + j0.035 150 MW 200 +j150 MVA 0.01+ j0.03 |V = 1.03 The admittance matrix (Y_bus)? 0.02 + jo.04 0.0125 + jo.03 2.
The phase currents in a delta-connected three-phase load are as follows: between the red and yellow lines, 30 A at p.f. 0.707 leading; between the yellow and blue lines, 20 A at unity p.f.; between the blue and red lines, 25 A at p.f. 0.866 lagging. Calculate the line currents and draw the complete phasor diagram. ANS: 21.6 A in R, 49.6 A in Y, 43.5 A in B
Q2) A 13.2-kV single-phase generator supplies power to a load through a transmission line. The load's impedance is Ztoad 500 236.87° ohm , and the transmission line's impedance is Zine = 60 253.1° ohm. To reduce transmission line losses to 0.0103 of its losses without using the transformers design and use two transformers T1 between the generator and the transmission line and T2 between the transmission line and the load.
1. a) Find the average power dissipated in the line shown.2. b) Find the capacitive reactance that when connected in parallelwith the load will make the load look purely resistive.3. c) What is the equivalent impedance of the load in (b)?4. d) Find the average power dissipated in the line when the capacitivereactance is connected across the load.5. e) Express the power loss in (d) as a percentage of the power lossfound in (a).
7. For the circuit below, calculate the value of Z₂ for maximum average power transfer to the load. In addition, determine the value of the maximum average power absorbed. (Hint: One approach is to find the open-circuit voltage and the short-circuit current.) j4 2 Vx -j2 n 16 Vx20 4/0° V ZL
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 RMS line current at load 1 and 2 respectively?

SEE MORE QUESTIONS

Recommended textbooks for you

Power System Analysis and Design (MindTap Course …

Electrical Engineering

ISBN:

9781305632134

Author:

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

Publisher:

Cengage Learning

Delmar's Standard Textbook Of Electricity

Electrical Engineering

ISBN:

9781337900348

Author:

Stephen L. Herman

Publisher:

Cengage Learning

Power System Analysis and Design (MindTap Course …

Electrical Engineering

ISBN:

9781305632134

Author:

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

Publisher:

Cengage Learning

Delmar's Standard Textbook Of Electricity

Electrical Engineering

ISBN:

9781337900348

Author:

Stephen L. Herman

Publisher:

Cengage Learning

SEE MORE TEXTBOOKS