CST - Insulated Cable Simulation

Hello everyone,

I am doing a project where I need to model an insulated cable to be used in the protection from lightnings, but I am a little bit don't know what to do, I am not sure what mesh should I use or how I can treat the E an H fields and I don't know how to do the current injection. My purpose is to reduce the electromagnetic field. 

If anyone could provide me with some help, I'd be grateful!

Thanks.

Omar

CST Studio Suite