What are these coils?

What are these coils

This was asked by doetoe in this physics.stackexchange Question

Where I saw them (maybe six or eight pairs) they came in pairs, always on the same two lines, and they were at approximately regular intervals.

It is from Spain, Barcelona area

  • \$\begingroup\$ I have always presumed that things like this were to stop oscillation in the wind, but I will be interested to know what they are really for. \$\endgroup\$
    – HandyHowie
    Commented Oct 8, 2015 at 7:12
  • \$\begingroup\$ I have never seen this particular kind, but I would bet they are dampers, have a google image search for "power line dampers" and you will see a lot of different constructions, some of which are similar, and some of which are nothing like it. \$\endgroup\$
    – PlasmaHH
    Commented Oct 8, 2015 at 8:06

1 Answer 1


Its a bird diverter, for make them see the power line and avoid them.

  • \$\begingroup\$ Thanks. It looks more like Bird Flight Diverter than spiral vibration damper. \$\endgroup\$ Commented Oct 8, 2015 at 14:26
  • 2
    \$\begingroup\$ To clarify - I asked my senior electrical engineer about how these work. Apparently, birds think that the coiled-up shape is a snake, which might eat them - i.e. it works like a scarecrow. Apparently it doesn't work on birds that normally eat snakes, such as kookaburras and eagles, which will sit on top of the thing and try to eat it. \$\endgroup\$ Commented Oct 9, 2015 at 4:13

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.