Question
Download Solution PDFWhich of the following is the correct interrelation between the variables x1 and x2 used in the expression to calculate the sag in a transmission conductor with different heights, where , variables x1 and x2 represent the horizontal distances of support at lower and higher levels from the lowest point of the conductor, respectively?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept
The sag in an overhead transmission line is given by:
\(S={WL^2\over 8T}\)
where, S = Sag
W = Weight per unit length of the conductors
L = Length of span
T = Tension of the conductor
Sag for unequal tower length:
From the figure: \(L=x_1+x_2\) where, \(x_1<x_2\)
\(h=S_2-S_1\)
\(h={WL_1^2\over 8T}-{WL_2^2\over 8T}\)
\(h={W\over 8T}(L_1^2-L_2^2)\)
Last updated on Jun 16, 2025
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