Transmission line length with sag

Question

I have a straight-line distance of 250 km between two towers and want to find the length of the transmission line that is between these two towers while accounting for the sag.

The line should be larger than 250 km. Given that the estimated sag is 60 m, how do I find the real transmission line? Can you provide me with references?

kamran · Answer

There are to problems with the question.

Over 250 kilometers earth has 5 kilometers curve. 
the weight and tension in the cable are prohibiting to normal materials. W*125000/60 = approximate tension.

Otherwise there are many references online to solve a catenary self weight cable length.

Transmission line length with sag

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