OVERVOLTAGE PROTECTION DEVICES

Technologies involved:
In the voltage switching category comes the Spark Gaps(SG) and Gas Discharge Tube(GDT) technology. In the Voltage limiting category comes the metal oxide varistor technology(MOV) and the siicon avalanche diode(SAD) technologies.
1)AIR TERMINATIONS
To protect the volume from direct lightning strikes
and to avoid uncontrolled strikes air termination are
used . Air termination is comprised by
air-termination rods and air-termination wires.
The location of air te ....etc

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good afternoon sir please i want to know the advantage and how the installation of thunder arrestor is. ....etc

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The aim of this study is to propose simple and reliable techniques to assess the condition of metal oxide arrester based on the dielectric response techniques. A number of modern electrical diagnostics for Metal Oxide Surge Arrester (MOSA) are discussed in this paper. The techniques included return voltage, decay voltage and polarisation/depolarisation current measurement. The single and multipulse current (8/20micros) was used to artificially degrade the MOSA. The before and after diagnostic r ....etc

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MODERN ZINC OXIDE SURGE ARRESTER



Introduction
The most important matter in a
power system is how to handle a fault condition. In power
system networks we have to maintain the voltage, current
and other network parameters at a specified value .
If an abnormal condition is occurred we
must take precaution against the abnormality to protect
the succeeding elements connected to the network.There
are many modern technique to clear the over voltage
condition due to surge fault ....etc

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please go through the following thread for getting more information

http://seminarsprojects.net/Thread-modern-electrical-metal-oxide-surge-arresters ....etc

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Lightning and Surge Protection Of Modern Electronic Systems

Introduction
In virtually all aspects of our modern lives, microprocessors and integrated circuits (ICs) are hard
at work processing digital data, controlling critical systems and communicating information
through ever-expanding global networks. These now common components have dramatically
lowered system costs while increasing the power and flexibility of modern electronic systems in a
manner unimaginable just a few years ago. Yet, few developers se ....etc

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to get information about the topic modern surge arresters full report ppt related topic refer the page link bellow

http://seminarsprojects.net/Thread-modern-electrical-metal-oxide-surge-arresters

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to get information about the topic lightning protection using lfa using long flashover arresters full report ppt and related topic refer the page link bellow

http://seminarsprojects.net/Thread-lightning-protection-using-lfa-m--1428

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http://seminarsprojects.net/Thread-lightning-protection-using-lfa-m-seminars-report?pid=52465

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Line Arresters In Transmission Line
Jithin Lal K
S7 E2 RN:220
College Of Engineering, Trivandrum
2007-11 batch




CONTENTS
1)Introduction
2)TLA Components
3)Types of TLA
4)Working of TLA
5)Arresters Location
6)Problems in Applications of TLA
7)Transverse Discharge
8)Experiments
9)Impulse Voltage Waveforms
10) Results
11)Minimum Distance
12)Conclusion


INTRODUCTION
Transmission Line Arresters (TLA)
Any arrester that is applied on the lines of a power system t ....etc

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