Solution-Calculate the most economical conductor size

Calculate the most economical conductor size

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Reference no: EM131186898

Question 1.
A 2-conductor cable 1 km long is required to supply a constant current of 200 A throughout the year. The cost of cable including installation is Rs. (20 a + 20) per metre where 'a' is the area of X-section of the conductor in cm2.

The cost of energy is 5P per kWh and interest and depreciation charges amount to 10%. Calculate the most economical conductor size. Assume resistivity of conductor material to be 1.73 μΩ cm.

Question 2.
The cost of a 3-phase overhead transmission line is Rs (25000 a + 2500) per km where 'a' is the area of X-section of each conductor in cm2. The line is supplying a load of 5 MW at 33kV and 0.8 p.f. lagging assumed to be constant throughout the year. Energy costs 4P per kWh and interest and depreciation total 10% per annum.

Find the most economical size of the conductor. Given that specific resistance of conductor material is 10-6 Ω cm.

Reference no: EM131186898

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Calculate the most economical conductor size

Reference no: EM131186898

Reference no: EM131186898

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