give me details of gas insulated substation ....etc

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pls provide me seminar report on GIS ....etc

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Combining Breadth-First and Depth-First Strategies in Searching for Treewidth

Rong Zhou
Palo Alto Research Center
3333 Coyote Hill Road
Palo Alto, CA 94304


Eric A. Hansen
Dept. of Computer Science and Engineering
Mississippi State University
Mississippi State, MS 39762

Abstract Breadth-first and depth-first search are basic search strategies upon which many other search algorithms are built. In this paper, we describe an approach to integrating these two strategies in a single algorithm that combi ....etc

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INTRODUCTION
Composed of pipes that houses conductors in SF6
Invented in 1974
Both overhead & underground system
Drawbacks of XLPE lead to GIL
Most economic, environment friendly & maintenance free alternative



WHY GIL
Installation expense is less
XLPE needs extra cooling arrangement
Allowe ....etc

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161/2014
Maximum : 100 marks
Time : 1 hour and 15 minutes

1.Which constituent in the earth gives plasticity to mould bricks?
(A)Lime
(B)Magnesia
(C ) Silica ’
(D) Alumina

2.The distance from the optical centre to the principle focus of a lens :
(A)Radius of curvature
(B)Focal length
(C )Focus
(D)None of these

3.The study of static electricity ;
(A)Electronics
(C )Electrostatic
(B)Electrostatic Field 
(D)Electron gravity

4.In optical systems, the lens of system of lenses closest to the observer� ....etc

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SF6 Gas insulated Substations (GIS) are preferred for voltage ratings of 72.5KV, 145KV, 245KV, 420KV and above. In such a situation, the various equipments like circuit breakers, busbars, isolators, and load break switches; current transformers, voltage transformers, earthing switches etc. are housed in metal enclosed modules filled with SF6 gas.

The SF6 gas provides the phase to ground insulation. As the dielectric strength of SF6 gas is higher than the air, the clearances required are smaller. Hence, the overall size of each equipment and ....etc

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GAS INSULATED SUBSTATION

INTRODUCTION
Conventional substations requires, small installation size, protection against atmospheric pollution and moisture, noiseless operation, nonexplosive and flame resistant, reduced maintenance, minimal radio interference, but totally enclosed substations using SF6 gas as insulation that are also known as GIS is now in widespread use in the electrical power industry .
It consist of
¢ Bus bars
¢ Circuit breakers
¢ Disconnecting switches
¢ Earthing switch ....etc

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I am not able to open the file Gas Insualted Substation file (size 4.7MB).Can you please send it in ppt format? ....etc

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Gas Insulated Substation (GIS)

Gas Insulated Substation (GIS) is a compact, multi component assembly enclosed in a ground metallic housing which the primary insulating medium is compressed sulphurhexaflouride(SF6) gas. It generally consists components of

a) Bus bars
b) Circuit Breakers
c) Disconnecting switches
d) Earthing switches
e) Current transformers
f) Voltage transformers
g) Cable and boxes
h) Gas supply and gas monitoring equipment
j) Local co ....etc

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I want a detail power point presentation on gas insulated substations ....etc

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