Determine the erection sag and tension of a transmission line at 65°C in still air. The line has a span of 300 m. ACSR conductor has the following data: Area = 240 mm²; overall diameter 20 mm; weight = 1.0 kg/m; ultimate strength = 8000 kg; coefficient of linear expansion = 18.44 x 10-PC; modulus of elasticity=9320 kg/mm². Also assume radial thickness of ice is 1.0 cm and a wind pressure 40 kg/m² of projected area and a temperature of -5°C as the worst condition. Weight of the ice is 910 kg/m³ and factor of safety = 2.0. Ans: 20.76 m; 541.9 kg.
Determine the erection sag and tension of a transmission line at 65°C in still air. The line has a span of 300 m. ACSR conductor has the following data: Area = 240 mm²; overall diameter 20 mm; weight = 1.0 kg/m; ultimate strength = 8000 kg; coefficient of linear expansion = 18.44 x 10-PC; modulus of elasticity=9320 kg/mm². Also assume radial thickness of ice is 1.0 cm and a wind pressure 40 kg/m² of projected area and a temperature of -5°C as the worst condition. Weight of the ice is 910 kg/m³ and factor of safety = 2.0. Ans: 20.76 m; 541.9 kg.
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Author:Robert L. Boylestad
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Transcribed Image Text:Determine the erection sag and tension of a transmission line at 65°C in still air. The line has a
span of 300 m. ACSR conductor has the following data: Area = 240 mm²; overall diameter =
20 mm; weight = 1.0 kg/m; ultimate strength = 8000 kg; coefficient of linear expansion = 18.44 x
10-PC; modulus of elasticity = 9320 kg/mm². Also assume radial thickness of ice is 1.0 cm and a
wind pressure 40 kg/m2 of projected area and a temperature of -5°C as the worst condition.
Weight of the ice is 910 kg/m³ and factor of safety = 2.0.
Ans: 20.76 m; 541.9 kg.
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