An overhead transmission line conductor weighs 0.35 kg/m. Ultimate strength is 800 kg and factor of safety is 2.0. Span length is 160 m. One support is at a height 70 m from the ground. Determine the minimum clearance from the ground and the lowest point of the catenary from the supports if the second support is at a height (a) 40 m (b) 65 m from the ground.

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter4: Transmission Line Parameters
Section: Chapter Questions
Problem 4.46P
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An overhead transmission line conductor weighs 0.35 kg/m. Ultimate strength is 800 kg and
factor of safety is 2.0. Span length is 160 m. One support is at a height 70 m from the ground.
Determine the minimum clearance from the ground and the lowest point of the catenary from the
supports if the second support is at a height (a) 40 m (b) 65 m from the ground.
Ans: (a) 40 m; (b) 64.14 m.
Transcribed Image Text:An overhead transmission line conductor weighs 0.35 kg/m. Ultimate strength is 800 kg and factor of safety is 2.0. Span length is 160 m. One support is at a height 70 m from the ground. Determine the minimum clearance from the ground and the lowest point of the catenary from the supports if the second support is at a height (a) 40 m (b) 65 m from the ground. Ans: (a) 40 m; (b) 64.14 m.
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