High voltage line electrical field influence upon suspended fiber cable

Suspended fiber cable close to high voltage line or electrical railway is under the electrical field influence. There are some different processes causing the cable damage. A dusting and moistening of sheath leads to current flow and surface sheath breakdown. The corona on the clamps gives rise to release of ozone and nitrogen oxides that can damage as metallic and dielectric constructions. The current flowing along aramid threads leads to water boiling and polyethylene thermal deformation and to swelling rise. Some aspects of these effects are considered.