Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Electrical & Electronics Expert

1) A 3-phase, 50 Hz overhead transmission line 100km. long has the following constants:

Resistance/km/phase = 0.1 ohm

Inductive reactance/km/phase = 0.2 ohm

Capacitive susceptance/km/ phase = 0.04 * 10-4 siemen

Find:

i) Sending end current

ii) Sending end voltage

iii) Sending end power factor and

iv) Transmission efficiency when supplying the balanced load of 10000 kW at 66 kV, p.f. 0.8 lagging.

2) Describe the voltage control of transmission line by:

i) Tap-changing transformers

ii) Synchronous condenser

iii) Induction regulators

3) A single core 66 kV cable working on 3-phase system has a conductor diameter of 2 cm. and a sheath of inside diameter 5.3 cm. If two intersheaths are introduced in such a way that the stress varies between the same maximum and minimum in the three layers, find:

a) Positions of intersheaths

b) Voltage on the intersheaths

c) Maximum and minimum stress

4) Derive an approximate expression for sag in overhead lines when supports are at the equal levels

5) a) describe what is lightning? describe the mechanism of lightning discharge.

b) describe the several kinds of the lightning stroke.

6) describe what is the surge absorber? Describe its types.

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M913276

Have any Question? 


Related Questions in Electrical & Electronics

Suppose that a discrete-time system is described by the

Suppose that a discrete-time system is described by the frequency response Find the frequency response of an equivalent system whose frequency response has five terms of ejv in the numerator and six terms of ejv in the d ...

1 explain the self-consistency condition for waveguiding in

1. Explain the self-consistency condition for waveguiding in a dielectric slab waveguide. 2. Discuss the dependence of the number of propagating modes in a dielectric slab waveguide on the ratio of the thickness d of the ...

You are to size a grid-connected south-facing pv system for

You are to size a grid-connected south-facing PV system for Las Vegas to deliver 4000 kWh/yr. Use a tilt equal to latitude minus 15°. a. What should be the ac-rated power of the PV/inverter system? b. What temperature de ...

A square plane-strain element is deformed as shown in the

A square plane-strain element is deformed as shown in the figure. The relationship between deformed and undeformed coordinates is given as x 1 = X 1 - αX 1 X 2 , x 2 = X 2 , x 3 = X 3 Compare the engineering strain and L ...

1 consult an appropriate reference book and compare the

1. Consult an appropriate reference book and compare the procedure used for obtaining the electromagnetic field due to the Hertzian dipole with the procedure used here. 2. What are radiation fields? Why are they importan ...

1 discuss the phenomenon of dispersion2 discuss the concept

1. Discuss the phenomenon of dispersion. 2. Discuss the concept of group velocity with the aid of an example. 3. What is a dispersion diagram? Explain how the phase and group velocities can be determined from a dispersio ...

1 state the divergence theorem and discuss its application2

1. State the divergence theorem and discuss its application. 2. What is the divergence of the curl of a vector? 3. Summarize Maxwell's equations in differential form. 4. Are all Maxwell's equations in differential form i ...

Ohms law problemsquestion 1an alarm clock draws 05 a of

Ohm's Law Problems Question 1 An alarm clock draws 0.5 A of current when connected to a 120 volt circuit. Calculate its resistance. a) 150 ohms b) 120 ohms c) 60 ohms d) 240 ohms Question 2 If one 9 volt battery is used ...

1 why is it necessary to have the displacement current term

1. Why is it necessary to have the displacement current term on the right side of Ampere's circuital law? 2.28. When can you say that the current in a wire enclosed by a closed path is uniquely defined? Give two examples ...

1 find the minimum value of h for which the gate shown

1. Find the minimum value of h for which the gate shown will rotate counterclockwise if the gate cross section is (a) rectangular, 4 ft × 4 ft; (b) triangular, 4 ft at the base × 4 ft high. Neglect bearing friction. 2. A ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen