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// A Texbook on POWER SYSTEM ENGINEERING
// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar
// DHANPAT RAI & Co.
// SECOND EDITION
// PART II : TRANSMISSION AND DISTRIBUTION
// CHAPTER 5: MECHANICAL DESIGN OF OVERHEAD LINES
// EXAMPLE : 5.3 :
// Page number 198-199
clear ; clc ; close ; // Clear the work space and console
// Given data
a = 2.5 // Cross-sectional area(sq.cm)
L = 250.0 // Span(m)
w_c = 1.8 // Weight of conductor(kg/m)
u = 8000.0 // Ultimate strength(kg/cm^2)
wind = 40.0 // Wind load(kg/cm^2)
s = 3.0 // Factor of safety
// Calculations
d = (4.0*a/%pi)**0.5 // Diameter(cm)
T = u*a/s // Allowable max tension(kg)
w_w = wind*d/100.0 // Horizontal wind force(kg)
w_r = (w_c**2+w_w**2)**0.5 // Resultant force(kg/m)
S = w_r*L**2/(8*T) // Slant sag(m)
vertical_sag = S*(w_c/w_r) // Vertical sag(m)
// Results
disp("PART II - EXAMPLE : 5.3 : SOLUTION :-")
printf("\nVertical sag = %.3f metres", vertical_sag)
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