lightning protection system

[vij36]

Respected members,

I was referring the below website for designing lightening arrester design required for a structure.
The typical figures mentioned about the structure i.e. height 23 meters, length 60 meters, width 28 meters almost matches our data.

Lightning protection system design

The below conclusions are made:
1) lightning protection is required
2) Down conductors as per base area = 6 No.
3) Down conductors as per perimeter = 6 No.
4) Minimum number of down conductors = 6 No.

How to know the height of lightning arrester ? Are there any calculations are there.
Kindly let me know.

Regards,

 

[cuky2000]

Not sure if there is clarity in what you are asking.

It should be noted taaahat there is a significant difference in surge arrester applications used for overvoltage control in the event of lightning and other electrical disturbances and is guided by standard such as the EEE C62.22-2009 -Guide for the Application of Metal-Oxide Surge Arresters for Alternating-Current Systems.

On the other hand, lightning protection for a direct lightning strike in building and substation is accomplished by ushing shielding protection. For building protection, usually, the air terminal is specified while in substation shield wire or lightning masts.

There are also differences between countries, and even in the same region they may be a significant difference between codes application. For instance in the US the NFPA 780 Standard is for the Installation of Lightning Protection Systems and IEEE Std 998-1996 for Direct Lightning Stroke Shielding of Substations

 

[argotier]

I will assume you mean to know the height of lightning rods (and not arrester as you said, because that leads to a different kind of lightning protection).

The proper method to calculate the rod height is described in the standards of application, as cuky said.

But for your reference and to ease your search, here are the basics:

The height of the lightning rod/s depends on the bulding/area you want to protect (these are called "protection/protected zones").

The higher you mount the rod, wider is the protected zone. The actual zone is determined by the standards, by means of protection angles (could be 45º as shown or other) or by the method of the rolling sphere:

Hope it helps.

 

[vij36]

Thank you all for the valuable replies.
So Early Streamer Emission Air Termination System (ESEEATS) is the right technical word.

Have found some calculations for knowing how much radius the rod can cover. I didn't understand the second equation. Could help me to clarify. Image attached.
Reference:

https://www.researchgate.net/public..._vs_conventional_lightning_protection_systems

Because the relative height of tip of rod to protected surface area is below 5m.

Regards,