How to protect a circuit against a lightning?

[H_u_n_t_e_r]

???Lightning problem

We have big trouble with lightning...
is there any idea- advice about protection system against to lightning...
also i want to make a protection system for electronic circuit which i make it. So is there any surge simulator circuit for control the effic. of the protection system.
Thank you so much for your helps.
Regards.

 

[flatulent]

cheapest solution

The cheap solution is to put MOV devices across the power inlet lines of your equipment. These are now made by Littlefuse company. Here is a link to their catalog that has many application notes. **broken link removed**

Look around their basic web site and you will find other application notes on how to protect data lines and telephone lines.

 

[jodokus]

In avionics, transzorbs and equivalent suppressors are frequently used. It is reasonably easy to protect against secondary lightning effects with these devices but it is not easy to protect against a direct strike. There are lightning simualtors but they are very expensive. The most expensive part is a high voltage and current capacitor. You will not find such a capacitor in your local component store. If you want to do some calculations in order to select protection components you might want to search for a document called "DO160". It has several example waveforms and with the transzorb datasheet you can select an effective prtotection part.