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Determine most economical size

Determine most economical size

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Determine most economical size of a 3-phase line which supplies the following load at 10 kV. Daily load curve: (i) 1000 kW at 0.8 p.f. lag for 10 hours, (ii) 500 kW at 0.9 p.f. lag for 8 hours and (iii) 100 kW at unity p.f. lag for 6 hours. The cost per km of the erected line is (8000 a+1500) where 'a' is the area of cross section of each conductor in cm?. The combined interest and depreciation is 10% per annum of capital cost. Cost of the energy losses is 80 paisa per kWh. Resistivity of conductor material is = 1.72 x 106 Q-cm.
Transcribed Image Text:Determine most economical size of a 3-phase line which supplies the following load at 10 kV. Daily load curve: (i) 1000 kW at 0.8 p.f. lag for 10 hours, (ii) 500 kW at 0.9 p.f. lag for 8 hours and (iii) 100 kW at unity p.f. lag for 6 hours. The cost per km of the erected line is (8000 a+1500) where 'a' is the area of cross section of each conductor in cm?. The combined interest and depreciation is 10% per annum of capital cost. Cost of the energy losses is 80 paisa per kWh. Resistivity of conductor material is = 1.72 x 106 Q-cm.
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