What are these triangles hanging from Power lines???

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  #1  
Old 11-10-07, 10:04 AM
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What are these triangles hanging from Power lines???

http://community.webshots.com/album/561391035MdgFXohttp://community.webshots.com/album/561391035MdgFXo

These are hanging from Power lines in Hillsdale, NY.
Can't quite figure what they are for!
Anyone know?
Thanks in advance.
 
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Old 11-10-07, 11:55 AM
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They stabilize the lines in high wind preventing them from swinging too close to each other or "bouncing" and working loose from the insulators.
 
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Old 11-10-07, 02:56 PM
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Why speradicly placed?

Thanks.
They are spread over a 4 mile section of hiway 20 in total.
Why would they be placed here & there?
What are they called?
 
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Old 11-10-07, 03:04 PM
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I meant: Why sporadically placed?

Thanks.
They are spread over a 4 mile section of hiway 20 in total.
Why would they be placed here & there?
What are they called?
 
  #5  
Old 11-10-07, 03:43 PM
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maybe anti-galloping devices

do an internet search. Icing and high winds cause trouble for overhead lines.
 
  #6  
Old 11-10-07, 04:51 PM
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These are likely windampers for stabilizing galloping lines. Galloping lines lead to cable fatigue and can result in downed lines.
 
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Old 11-11-07, 12:13 PM
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Yes, these are anti-galloping/vibration devices. They also come shaped like basketballs, and a "sideways H" design. Old ones often were simply a bucket full of cement hanging below the wire.
They are only placed where local conditions have caused a problem; that's why they are irregularly placed.
 
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Old 11-11-07, 12:31 PM
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The orange marker balls make the power lines visible to low flying air craft. Wirestrikes is the number one cause of helicopter crashes.

http://www.mcmc-law.com/sub/wire-strikes.jsp
 
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