LIGHTNING PROTECTION USING LFA-M PDF DOWNLOAD

Explore Lightning Protection Using LFA-M with Free Download of Seminar Report and PPT in PDF and DOC Format. Also Explore the Seminar Topics Paper on. 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. Presentation on theme: “LIGHTENING PROTECTION USING LFA-M”— System ”-A system of lightning protection conductors lightning rods -installed on the.

Author: Faesida Aramuro
Country: Hungary
Language: English (Spanish)
Genre: Business
Published (Last): 28 May 2007
Pages: 496
PDF File Size: 3.58 Mb
ePub File Size: 14.68 Mb
ISBN: 476-9-46157-759-7
Downloads: 3315
Price: Free* [*Free Regsitration Required]
Uploader: Kern

Each cable piece has a semi conductive core of resistance R. It is stressed by fairly steep over voltage impulses associated with direct lightning strokes on a conductor.

Then mail to us immediately to get the full report. It is shown that the steepness and not the magnitude of lightning current I l l I l is the important factor in the performance if a LFA protected line prltection 1 can be lightning protection using lfa-m in the following form. Direct stroke Indirect stroke. In direct stroke, the lightning discharge is directly from the cloud to the an overhead line.

Lightning protection using lfa-m the total voltage U is applied to each flashover module at the same moment, and all three modules are assured conditions for simultaneous initiation of creeping discharges developing in to a single long flashover channel.

Uding induced over voltages can be counteracted by installing a single arrester on an overhead line support pole.

If only a partial flashover of the arrester occurred. Both results put an. Electricity The movement of charge from one place to another Requires energy to move the charge Also requires conductors. Automatically changes to Flash or non-Flash embed.

Related Posts   HOW TO WIN OFFICE POLITICS BY GIREESH SHARMA EBOOK

Seminar for you: Lighting protection using LFA-M

If the cloud Lightning protection using lfa-m shift too nearer to cloud Q,Then lightning discharge will occur between them and charges on both these ksing disappear quickly. At this point, the calculation is stopped and the output is printed, including the steepness of the lightning current I 1 1 at which the insulator llghtning over. Devices which capture the high voltage sparks resulting out of lightening.

In direct stroke, the lightning discharge is directly from the cloud to the an overhead line.

LIGHTENING PROTECTION USING LFA-M

Tests have been shown that, as the line conductor is stressed by lightning over voltage impulse, flash over channel develop at different rates. Provides a low-impedance path for the lightning current to lessen the heating effect. Where N DLS is the number of direct lightning stroke DLS on a line; P I l is the probability of lightning current lightning protection using lfa-m to cause flashovers of the line insulation; P arc is the probability of a power are caused by an impulse flashover an insulator; and P rc is the probability of successful line breakers enclosures.

As seen in fig 3. Thus the total voltage is applied to each flashover module at the same moment, and all the three flashover modules 1, 2 and 3 are assured conditions for simultaneous initiation of creeping discharges which,with respective modules flashed over, develop a single long flashover channel. The roof lightning protection using lfa-m Interconnection to grounding electrodes Grounding electrodes.

Related Posts   THE KINGDOM INTERLINEAR TRANSLATION OF THE GREEK SCRIPTURES 1985 EBOOK

Charge on the cloud Q is bound by cloud R. The result is that charge on cloud R suddenly become free and it then discharges rapidly to earth, ignoring tall object.

Lightning-Protection-Using-Lfa-M-My-Ppt |authorSTREAM

Lightning is a huge spark that takes place when clouds are charged to a high potential with respect to earth object e. It keeps increasing at a still slower rate until time t 3.

The equivalent EMF e is calculated as follows. When cloud discharges to earth, -ve charge rushes along both directions in lightning protection using lfa-m of travelling wave. To make this website work, we log user data and share it with processors. For the protection of lines against direct lightning strokes, the arresters are connected between the poles and all of the phase conductors in parallel with the insulators. Therefore, in order to protect the line against the direct lightning stroke.

The result is lightning protection using lfa-m charge on cloud R suddenly become free and it then discharges rapidly to earth, ignoring tall object. Vitthal Patnecha 13 January Posted by Sagar at 4: The above calculation does not take into account the effect of near-by poise: Types of lightning II.