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

Two-wattmeter method is used to measure the power absorbed

Two-wattmeter method is used to measure the power absorbed by a 3-phase induction motor. The wattmeter readings are 12.5kw and 4.8 kw. find: i) the power absorbed by the machine ii) load power factor iii) reactive power ...

The section bus-bars a and b are linked by a bus-bar

The section bus-bars A and B are linked by a bus-bar reactor rated at 5000 kVA with 10% reactance. On bus-bar A, there are two generators each of 10,000 kVA with 10% reactance and on B two generators each of 8000 kVA wit ...

A diode for which n 1 conducts 01 ma at 07 v find its

A diode for which n = 1 conducts 0.1 mA at 0.7 V. Find its voltage drop at 1 mA. For what current is its voltage drop equal to 0.815 V?

Repeat given problem for the following sinusoidal function

Repeat given problem for the following sinusoidal function, and compare results. In particular, determine the frequency of the waveforms of Problems, and compare the magnitude of the derivative. v = 1 sin 15.71t Problem ...

Consider the circuit shown in given figureausing a computer

Consider the circuit shown in given Figure(a). Using a computer simulation, plot the loop gain as a function of frequency.

Two feedback configurations are shown in figures a and b at

Two feedback configurations are shown in Figures (a) and (b). At low input voltages, the two gains are A 1  = A 2  = 90 and at higher input voltages, the gains change to A 1  = A 2  = 60. Determine the change in closed-l ...

In chapter 3 we developed a matlab program that can be used

In Chapter 3 we developed a MATLAB program that can be used to investigate the acquisition performance of a PLL. Using the same baseband model developed in Chapter 3, we now wish to examine acquisition performance in the ...

Introductionthis next portion of your program is a

INTRODUCTION This next portion of your program is a project-based assignment designed for you to demonstrate your understanding of the National Electrical Code and your ability to apply the requirements and their interpr ...

The zener diode shown in fig 310a has a voltage breakdown

The Zener diode shown in Fig. 3.10a has a voltage breakdown of 100 V with a maximum rated current of 20 mA. If the supply voltage is 150 V, find the range of load resistance R L over which the circuit is useful in mainta ...

Questionfor the rotational mechanical system given below

Question: For the rotational mechanical system given below, find the transfer function

  • 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

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate