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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E85 as a fuel is widely used in Sweden and is becoming increasingly common in the United States, mainly in the Midwest where corn is a major crop and is the primary source material for ethanol fuel production.

E85 is usually used in engines modified to accept higher concentrations of ethanol. Such flexible-fuel engines are designed to run on any mixture of gasoline or ethanol with up to 85% ethanol by volume. Th ....etc

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E85
is an alcohol fuel mixture of 85% ethanol and 15% gasoline, by volume. ethanol derived from crops (bioethanol) is a biofuel.E85 as a fuel is widely used in Sweden and is becoming increasingly common in the United States, mainly in the Midwest where corn is a major crop and is the primary source material for ethanol fuel production.

E85 is usually used in engines modified to accept higher concentrations of ethanol. Such flexible-fuel engines are designed to run on any mixture of gasoline or et ....etc

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i want the report on transmission line protection against lightning using arrestors. its urgent ....etc

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ABSTRACT
Voltage sags, transients, and momentary interruption of power together constitute 92% of the PQ problems encountered by typical industrial customers.
Productivity loss due to deep voltage sags and brief power interruptions has
been called the most important concern affecting most industrial and commercial
customers. These power quality (PQ) events typically last for less than one second,
impressing voltage sags down to 50% of nominal voltage, with occasional short-term interruptions lasting for approximately ....etc

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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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presented by:
RAMNIWAS GURJAR


LIGHTING ARRESTER
INRTODUCTION
Lightning arresters or surge diverters are used to protect the earth screen and ground wires in an electrical system against direct lightning strokes. They conduct the high voltage surges to the ground without getting affected to the system. The lightning arrestor provides a cone of protection which has a ground radius approximately equal to its height above the ground.
The surge diverters consist of a spark gap in series with a nonlinear resistor ....etc

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E85 is an alcohol fuel mixture of 85% ethanol and 15% gasoline, by volume. ethanol derived from crops (bioethanol) is a biofuel.
E85 as a fuel is widely used in Sweden and is becoming increasingly common in the United States, mainly in the Midwest where corn is a major crop and is the primary source material for ethanol fuel production.
E85 is usually used in engines modified to accept higher concentrations of ethanol. Such flexible-fuel engines are designed to run on any mixture of gasoline or ethanol with up to 85% ethanol by volume. The pr ....etc

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Core and windings:
The core of the transformer is made up of thin laminated (insulated) metal sheets of soft iron pressed together. The 3ph primary and secondary is wound over the core. In the transformer used here in 33 KV Duliajan power station switchyard is delta connected at the LV side and star connected at the HV side.
Conservator:
The conservator is a tank containing the oil used for cooling and proper insulation of the core. A level gauge is attached with the conservator to indicate the oil level. There are two t ....etc

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