The cost of a 2-core feeder cable, including installation is (90 a + 20) per meter and the interest and depreciation charges are 10 per cent. The cable is 2 km in length and cost of energy is 4 % per unit. The maximum current in the feeder is 250 A and the demand is such that the copper loss is equivalent to what would be produced by the full current flowing for 6 months. If the resistance of a conductor of 1 square cm and 1 km length is 0.173 Ω, calculate the most economical cross-sectional area. [Ans: a = 0.649 cm2 ].
The cost of a 2-core feeder cable, including installation is (90 a + 20) per meter and the interest and depreciation charges are 10 per cent. The cable is 2 km in length and cost of energy is 4 % per unit. The maximum current in the feeder is 250 A and the demand is such that the copper loss is equivalent to what would be produced by the full current flowing for 6 months. If the resistance of a conductor of 1 square cm and 1 km length is 0.173 Ω, calculate the most economical cross-sectional area. [Ans: a = 0.649 cm2 ].
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The cost of a 2-core feeder cable, including installation is (90 a + 20) per
meter and the interest and depreciation charges are 10 per cent. The cable is 2 km in
length and cost of energy is 4 % per unit. The maximum current in the feeder is 250 A
and the demand is such that the copper loss is equivalent to what would be produced
by the full current flowing for 6 months. If the resistance of a conductor of 1 square
cm and 1 km length is 0.173 Ω, calculate the most economical cross-sectional area.
[Ans: a = 0.649 cm2
].
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