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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Krishna.V
project idea on wireless power theft monitoring system and indication at local substations.
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project abstract and basic idea on wireless power theft monitoring system and indication at local substations

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A Switchyard or Substation, consisting of large breakers and towers, is usually located in an area close to the plant. The substation is used as the distribution center where:
• electrical power is supplied to the plant from the outside, and
• electrical power is sent from the plant
Often there are at least 2 main Buses. Very high voltages (typically 220,000 or 345,000 volts) are present. Gas and oil circuit breakers are used. The gas (e.g. sulfur hexaflouride) or oil is used to extinguish the arc caused when a brea ....etc

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V.Krishna
i want the whole report on the topic wireless power theft monitoring system and indication at local substations for industrial application its urgent.please provide as soon as possible


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DESCRIPTION
When it comes to managing yoursubstation, the challenges can bedifficult. Anything from unknownequipment status to unexpectedoutages can turn decision makinginto guesswork. Now, GE is bringingyou an improved solution for yoursubstation automation needs. Withintegrated solutions from GE PowerManagement and GE Harris EnergyControl Systems, the total return oninvestment for your substationautomation project can be evengreater.GE Substation Automation systemsprovide comprehensive automatedpower management, protection,control, a ....etc

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INTRODUCTION
Traditionally, the protection of power transformers has been relegated to the application of transformer differential and backup overcurrent relays to provide shortcircuit protection. With the advent of modern multifunction transformer packages, differential and overcurrent protection are only two of many protective and logic functions that can be incorporated into the transformer protection package to enhance value to the user. Other protective functions include overexcitation protection (24), neutral overvoltage (59G), ground ....etc

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How many substations are there in india till 2012 ? ....etc

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