ELECTRICAL AND CHEMICAL DIAGNOSTICS OF TRANSFORMER INSULATION

CASE STUDY 2:DISTRIBUTION TRANSFORMERS
CONVENTIONAL ELECTRIC TESTS RESULTS

INTERFACIAL POLARIZATION TEST RESULTS
GPC TEST RESULTS
Advantages and disadvantages of IPS measurements
Advantages and disadvantages of GPC
Goals of future diagnostic methods
CONCLUSION
REFERENCES


INTRODUCTION
Reliability of a power system depends on trouble free transformer operation
Significant no of power transformers are operating ....etc

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COST EFFECTIVENESS OF MINERAL WOOL INSULATION Vs PERLITE INSULATION
PROJECT REPORT
Submitted by
DIPU.K.SHAJI GITHU BABU VARUN KUMAR. T.K VIMAL MENON
ABSTRACT
The main objective of this project is to make the cost effectiveness analysis of the system of the thermal insulation of the pipe lines in petrochemical plant which carries steam. In a chemical plant maintaining temperature of fluids in different pipe lines assume greatest importance as each process is performed at particular temperature.
The project work was car ....etc

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To get full information or details of silicon oxide nitride oxide silicon please have a look on the pages

http://seminarsprojects.net/Thread-silicon-oxide-nitride-oxide-silicon-memmory-sonos

if you again feel trouble on silicon oxide nitride oxide silicon please reply in that page and ask specific fields in silicon oxide nitride oxide silicon ....etc

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Abstract


A multidisciplinary team of end users and suppliers has collaborated to develop a novel yet broadly enabling process for the design, fabrication and assembly of Micro-Opto-Electro-Mechanical Systems (MOEMS). A key goal is to overcome the shortcomings of the polysilicon layer used for fabricating optical components in a conventional surface micromachining process. These shortcomings include the controllability and uniformity of material stress that is a major cause of curvature and deformation in released microstructures. The appr ....etc

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A. BHEL an overview
BHEL is the largest engineering and manufacturing enterprise in India in the energy related infrastructure sector today. BHEL was established more than 40 years ago when its first plant was setup in Bhopal ushering in the indigenous Heavy Electrical Equipment Industry in India a dream which has been more than realized with a well recognized track record of performance it has been earning profits continuously since 1971-72.
BHEL caters to core sectors of the Indian Economy viz., Power Genera ....etc

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ABSTRACT

This paper provides an introduction to silicon-on-insulator (SOI) technology and the operating principles of high-voltage SOI devices, reviews the performance of the available SOI switching devices in comparison with standard silicon devices, discusses the reasoning behind the use of SOI technology in power applications and covers the most advanced novel power SOI devices proposed to date. The impact of SOI technology on power integrated circuits (PICs) and the problems associated with the integration of high-voltage and low- ....etc

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A SONOS memory cell is formed from a standard polysilicon NMOS transistor with the addition of a small sliver of silicon nitride inserted inside the transistor's gate oxide. The sliver of nitride is non-conductive but contains a large number of charge trapping sites able to hold an electrostatic charge. The nitride layer is electrically isolated from the surrounding transistor, although charges stored on the nitride directly affect the conductivity of the underlying transistor channel. The oxide/nitride sandwich typically consists of a 2 nm thi ....etc

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ABSTRACT
This paper describes the application of two relatively new diagnostic techniques for the determination of insulation condition in aged transformers. The techniques are (a) measurements of interfacial polarization spectra by a DC method and (b) measurements of molecular weight and its distribution by gel permeation chromatography. Several other electrical properties of the cellulose polymer were also investigated. Samples were obtained from a retired power transformer and they were ana ....etc

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sir,can i know what is vpi process? & how do we manufacture turbogenerator by using VPI process? please ....etc

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Silicon on insulator technology (SOI) refers to the use of a layered silicon-insulator-silicon substrate in place of conventional silicon substrates in semiconductor manufacturing, especially microelectronics, to reduce parasitic device capacitance and thereby improving performance SOI-based devices differ from conventional silicon-built devices in that the silicon junction is above an electrical insulator, typically silicon dioxide or (less commonly) sapphire. The choice of insulator depends largely on intended application, with sapphire being ....etc

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