Question
Download Solution PDFThe height between the two supports of a transmission and distribution overhead line can be determined as:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept
Sag: It is defined as the vertical distance between two points of support of the transmission towers and the lowest peak point of the conductor.
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
Explanation:
From the figure:
The height between the two supports of a transmission and distribution overhead line = Vertical distance between the higher height support point of the conductor and the Lowest point of the conductor - Vertical distance between the lower height support point of the conductor and lowest point of the conductor
\(h=S_2-S_1\)
\(h={Wx_2^2\over 8T}-{Wx_1^2\over 8T}\)
Last updated on Jun 16, 2025
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