Isolating spark gaps provide galvanic isolation of electrically conducting parts of an installation that must not be connected to each other.

The bridging of proximity points or making connections to pipe work and tank installations that have cathodic corrosion protection.

OBO protection spark gap 482 is used to bridge proximity points between the service entry mast of a low-voltage overhead line and components of the external lightning protection system in accordance with VDE 0100 and VDE 0185.