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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 : 4.8 :
+// Page number 187-188
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+n = 3.0              // Number of insulators
+
+// Calculations
+V_1 = 0.988                 // Voltage across top unit as middle unit
+V_3 = 1.362                 // Voltage across bottom unit as middle unit
+V_2 = 1/(V_1+1+V_3)         // Voltage across middle unit as % of line voltage to earth
+V1 = V_1*V_2*100            // Voltage across top unit as % of line voltage to earth
+V2 = V_2*100                // Voltage across middle unit as % of line voltage to earth
+V3 = V_3*V_2*100            // Voltage across bottom unit as % of line voltage to earth
+eff = 100/(n*V3/100)        // String efficiency(%)
+
+// Results
+disp("PART II - EXAMPLE : 4.8 : SOLUTION :-")
+printf("\nCase(a): Voltage across top unit as a percentage of line voltage to earth, V_1 = %.2f percent", V1)
+printf("\n         Voltage across middle unit as a percentage of line voltage to earth, V_2 = %.2f percent", V2)
+printf("\n         Voltage across bottom unit as a percentage of line voltage to earth, V_3 = %.2f percent", V3)
+printf("\nCase(b): String efficiency = %.2f percent", eff)