High voltage line upper position placed fibre optic cable having center with helix groove containing flexible tubes/fibre optic sections and flexible material

摘要

The fibre optic cable construction has a section (1) with a helix groove (2) on the outside. There are two flexible tubes (4) with a fibre optic section (6). A flexible material (7) is placed between the tubes and the outer groove. There are rigidisers (9) around the section.