Design of Lightning Arrestor System

Dear Mr.Vivek 1981,

Please refer my reply dt o6-5-2010 on this subject. Please

remember the topics as you read the threads in this forum and do not waste our &

your time.

Manroop.Chennai.

Dear vivek,

Sorry for our former CEO s (Manroop) negative reply. You can ignore it as he is not incharge now. We already removed him from the post.

Director

CR4

Please get a copy of IS 2319 (The Indian Standard Code of Practice for Protection of Buildings & Structures against Lightning). If you read it sincerely, you can design Lightning Protection System for any type of building or structure. It is an excellent guide material on the subject.

The field is deep and wide and very technical, but a good rule of thumb is to draw a line at a 45 degree angle from the top of the lightning rod to the ground.

Anything inside of this cone will generally be provided protection.

A very crude approximation, but a lot of good science behind it.

HTRN

Since thunder strikes and discharge differs according to locations, a design specification will be necessary for a particular area. An important factor to note is that the higher the spike, the more the radius of protection.A standard value of 100m radius is usually adopted, meaning if there is a good lightning arrestor within a vicinity of 100m radius, installing another spike in such vicinity is waste of resources.

There are different types of thunder spikes available in the market to day, the important issue is to select the one that will achieve Ur purpose. Factors to be considered in Ur selection are mainly peak values of discharged current and voltage.

Calculation for the above and standard tables can be gotten from the following websites.

1) www.sholarshipinindia.com on the topic How does lightning arrestor work.

2) cnxierli.en.alibaba.com/ESE_lightning_arrestor_rod_thunder_protector--- on radius calculation and tables.

Dickson.