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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 4: OVERHEAD LINE INSULATORS
+
+// EXAMPLE : 4.4 :
+// Page number 184-185
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+V_3 = 17.5          // Voltage across line unit(kV)
+c = 1.0/8           // Shunt capacitance = 1/8 of insulator capacitance
+n = 3.0             // Number of insulators
+
+// Calculations
+K = c                       // String constant
+V_1 = V_3/(1+3*K+K**2)      // Voltage across top unit(kV)
+V_2 = (1+K)*V_1             // Voltage across middle unit(kV)
+V = V_1+V_2+V_3             // Voltage between line & earth(kV)
+eff = V*100/(n*V_3)         // String efficiency(%)
+
+// Results
+disp("PART II - EXAMPLE : 4.4 : SOLUTION :-")
+printf("\nLine to neutral voltage, V = %.2f kV", V)
+printf("\nString efficiency = %.2f percent", eff)