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Title: Overvoltage protection concept for DC railway systems
Page Link: Overvoltage protection concept for DC railway systems -
Posted By: seminar addict
Created at: Thursday 26th of January 2012 06:30:04 PM
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Overvoltage protection concept for DC railway systems



ABSTRACT

Overvoltages in electrical networks result from the effects of lightning strokes and switching actions and cannot be avoided. Furthermore, the power supply of electrical railways is endangered by direct or nearby lightning. A new device, combining protection against overvoltages and touch voltages and protection of people is introduced. Protection concepts for DC railway systems are introduced, cons ....etc

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Title: by using at89s52 making water level controller
Page Link: by using at89s52 making water level controller -
Posted By:
Created at: Wednesday 28th of January 2015 04:50:30 PM
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Ple send by using at89s52 making water level controller project report ....etc

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Title: under voltage relay simulation in simulink
Page Link: under voltage relay simulation in simulink -
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Created at: Tuesday 31st of May 2016 05:27:55 PM
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Title: Voltage Swell and Overvoltage Compensation
Page Link: Voltage Swell and Overvoltage Compensation -
Posted By: Wifi
Created at: Saturday 16th of October 2010 01:30:31 AM
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This article describes the Voltage swell and overvoltage compensation problems in a diode-bridge rectifier supported transformerless-coupled
dynamic voltage restorer (DVR). applying conventional in-phase or phase-invariant boosting method in case of condition of swell or overvoltage, may cause a a rapid rise in dc-link voltage which may ultimately lead to the damage of the storage capacitors and switching devices, and increase the switching loss. The minimum energy injection scheme is unable to solve these problems. Here, a novel unidirectio ....etc

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Title: Lightning Protection Using LFA-M seminars report
Page Link: Lightning Protection Using LFA-M seminars report -
Posted By: electronics seminars
Created at: Friday 01st of January 2010 02:54:42 PM
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ABSTRACT
A long flashover arrester (LFA), which comprises of three flashover modules using the creeping discharge effect, is described in this paper. In this design, the total arrester stressing voltage is applied simultaneously to all of the three modules so that the voltage-time characteristics of the arresters are improved. It assured reliable protection of medium voltage (e.g., 10kv) over head power line against both ....etc

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Title: overvoltage protection matlab program
Page Link: overvoltage protection matlab program -
Posted By:
Created at: Wednesday 07th of November 2012 12:38:46 PM
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Title: Lightning Protection Using LFA-M
Page Link: Lightning Protection Using LFA-M -
Posted By: computer science crazy
Created at: Sunday 15th of February 2009 02:36:04 PM
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Lightning Protection Using LFA-M

Introduction
A new simple, effective and inexpensive method for lightning protection of medium voltage overhead distribution line is using long flashover arresters (LFA). A new long flashover arrester model has been developed.

It is designated as LFA-M. It offers great number of technical and economical advantages. The important feature of this modular long flashover arrester (LFA-M) is that it can be applied for lightning protection of overhead distribution line against both induced overvoltages and dire ....etc

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Title: Automation Control project report
Page Link: Automation Control project report -
Posted By: computer science topics
Created at: Sunday 20th of June 2010 01:12:51 AM
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Project Title: Automation & Control
Student's Name: Viral Mandaviya
Programme: B.Tech Mechanical & Automation Engineering
Year: 2006-2010
Semester: 7th
Faculty Guide: D. K Sharma
industry Guide: Franklin Stephenson


ABSTRACT

The demands made on the surface quality and thickness of steel strip have increased in recent years. At the same time, operators have had to concentrate on maintaining high annual production rates. To balance these needs, plants have to be equipped with advanced electrical s ....etc

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Title: Voltage Swell and Overvoltage Compensation
Page Link: Voltage Swell and Overvoltage Compensation -
Posted By: Wifi
Created at: Saturday 16th of October 2010 01:30:31 AM
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This article describes the Voltage swell and overvoltage compensation problems in a diode-bridge rectifier supported transformerless-coupled
dynamic voltage restorer (DVR). applying conventional in-phase or phase-invariant boosting method in case of condition of swell or overvoltage, may cause a a rapid rise in dc-link voltage which may ultimately lead to the damage of the storage capacitors and switching devices, and increase the switching loss. The minimum energy injection scheme is unable to solve these problems. Here, a novel unidirectio ....etc

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Title: MAGNETICALLY CONTROLLED REACTORS TO ENHANCE TRANSMISSION CAPABILITY SAVE ENERGY full
Page Link: MAGNETICALLY CONTROLLED REACTORS TO ENHANCE TRANSMISSION CAPABILITY SAVE ENERGY full -
Posted By: project report tiger
Created at: Sunday 14th of March 2010 10:37:19 PM
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MAGNETICALLY CONTROLLED REACTORS TO ENHANCE TRANSMISSION CAPABILITY& SAVE ENERGY

ABSTRACT
The reactive power problem will become intensified in the future with the increasing use of EHV overhead lines and high-voltage cable in densely populated areas. Generators alone, with their under excited
limitations during light load periods, may not have sufficient capability to control voltages in some systems in which substantial amounts of high-voltage cable are used. Turbine generators with automatic voltage regulators, ....etc

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Title: Lightning Protection Using LFA-M seminars report
Page Link: Lightning Protection Using LFA-M seminars report -
Posted By: electronics seminars
Created at: Friday 01st of January 2010 02:54:42 PM
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ABSTRACT
A long flashover arrester (LFA), which comprises of three flashover modules using the creeping discharge effect, is described in this paper. In this design, the total arrester stressing voltage is applied simultaneously to all of the three modules so that the voltage-time characteristics of the arresters are improved. It assured reliable protection of medium voltage (e.g., 10kv) over head power line against both ....etc

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Title: wdg4 locomotive
Page Link: wdg4 locomotive -
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Created at: Thursday 15th of March 2012 02:48:02 AM
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Title: UNINTRUPTABLE POWER SUPPLY UPS
Page Link: UNINTRUPTABLE POWER SUPPLY UPS -
Posted By: seminar class
Created at: Thursday 21st of April 2011 07:10:49 PM
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INTRODUCTION:
An uninterruptible power supply, also uninterruptible power source, UPS or battery/flywheel backup, is an electrical apparatus that provides emergency power to a load when the input power source, typically the utility mains, fails. A UPS differs from an auxiliary or emergency power system orstandby generator in that it will provide instantaneous or near-instantaneous protection from input power interruptions by means of one or more attachedbatteries and associated electronic circuitry for low power user ....etc

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