A transmission line has a span of 250 m between supports, the supports being at the same level. The conductor has a cross-sectional area of 1·29 cm2. The ultimate strength is 4220 kg/??2 and factor of safety is 2. The wind pressure is 40 kg/??2. Calculate the height of the conductor above ground level at which it should be supported if a minimum clearance of 7m is to be kept between the ground and the conducto Q 2: (CLO 3)(10)A transmission line has a span of 250 m between supports, the supports being at the same level.The conductor has a cross-sectional area of 1-29 cm2. The ultimate strength is 4220 kg/cm² andfactor of safety is 2. The wind pressure is 40 kg/cm². Calculate the height of the conductor aboveground level at which it should be supported if a minimum clearance of 7m is to be kept betweenthe ground and the conductor.

Given: A transmission line between two supports at same level and in which…

A transmission line has a span of 250 m between supports, the supports being at the same level. The conductor has a cross-sectional area of 1·29 cm2. The ultimate strength is 4220 kg/??2 and factor of safety is 2. The wind pressure is 40 kg/??2 . Calculate the height of the conductor above ground level at which it should be supported if a minimum clearance of 7m is to be kept between the ground and the conducto

A transmission line has a span of 250 m between supports, the supports being at the same level. The conductor has a cross-sectional area of 1·29 cm2. The ultimate strength is 4220 kg/??2 and factor of safety is 2. The wind pressure is 40 kg/??2 . Calculate the height of the conductor above ground level at which it should be supported if a minimum clearance of 7m is to be kept between the ground and the conducto

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 4.3P: A transmission-line cable with a length of 2 km consists of 19 strands of identical copper...

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A transmission-line cable with a length of 2 km consists of 19 strands of identical copper conductors, each 1.5 mm in diameter. Because of the twist of the strands, the actual length of each conductor is increased by 5. Determine the resistance of the cable if the resistivity of copper is 1.72-cm at 20C.
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The Aluminum Electrical Conductor Handbook lists a dc resistance of 0.01558 ohm per 1000 ft (or 0.05112 ohm per km) at 20 degree celcius and a 60 Hz resistance of 0.0956 ohm per mile (or 0.0594 ohm per km) at 50 degree celcius for the all-aluminum Marogold conductor, which has 61 strands and whose size is 564 mm2 or 1113 kcmil. Assuming an increase in resistance at 50 degree celcius, and determine the percentage due to skin effect.
Q4. A Transmission Line has a span of 250 meters between two level supports. The conductor has a cross-sectional area of 1.29 cm2, weighs 1170 kg/km and has a breaking stress of 4218 kg/cm2. Calculate the sag for a safety factor of (5), allowing a wind pressure of 122 kg per square meter of projected area. What is the vertical sag?
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