Today, many structures contain a spectrum of electrical and electronic systems as well
as computer networks or industrial automation systems. Such systems require lightning
protection and this has to be provided in addition to the lightning protection
systems already installed on structures to prevent material damage and remove
risk to lives. Such systems are not only threatened by the immediate effects of
direct lightning strikes (fire, explosions, mechanical and chemical damage), but also
by the indirect effects of lightning (i.e. surges and magnetic fields).