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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 : 4.3 :
+// Page number 184
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+n = 3.0             // Number of insulators
+
+// Calculations
+V_1 = 155.0/475.0            // Potential across top unit
+V_2 = 154.0/155.0*V_1        // Potential across middle unit
+V_3 = 166.0/155.0*V_1        // Potential across bottom unit
+eff = 100/(n*V_3)            // String efficiency(%)
+
+// Results
+disp("PART II - EXAMPLE : 4.3 : SOLUTION :-")
+printf("\nVoltage across top unit, V_1 = %.3f*V", V_1)
+printf("\nVoltage across middle unit, V_2 = %.3f*V", V_2)
+printf("\nVoltage across bottom unit, V_3 = %.2f*V", V_3)
+printf("\nString efficiency = %.2f percent", eff)