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+// FUNDAMENTALS OF ELECTICAL MACHINES 
+// M.A.SALAM 
+// NAROSA PUBLISHING HOUSE 
+// SECOND EDITION
+
+// Chapter 3 : TRANSFORMER AND PER UNIT SYSTEM
+// Example : 3.6
+clc;clear; // clears the console and command history 
+
+// Given data
+V_1 = 2000  // primary voltage of transformer in V
+V_2 = 400   // secondary voltage of transformer in V
+kVA = 200   // kVA rating of transformer
+R_1 = 3     // primary resistance in Ω
+X_1 = 12    // primary reactance in Ω
+R_2 = 0.3   // secondary resistance in Ω
+X_2 = 0.1   // secondary reactance in Ω
+
+// caclulations 
+a = V_1/V_2 // turn ratio
+R_01 = R_1+(a^2*R_2)           // total resistance referred to primary side Ω
+X_01 = X_1+(a^2*X_2)           // total reactance referred to primary side Ω
+Z_01 = sqrt((R_01^2)+(X_01^2)) // equivalent impedance reffered to primary side in Ω
+R_02 = R_2+(R_1/a^2)           // total resistance referred to secondary side Ω
+X_02 = X_2+(X_1/a^2)           // total reactance referred to secondary side Ω
+Z_02 = sqrt((R_02^2)+(X_02^2)) // equivalent impedance reffered to secondary side in Ω
+
+// display the result 
+disp("Example 3.6 solution");
+printf(" \n Equivalent impedance reffered to primary side \n Z_01 = %.1f Ω \n", Z_01);
+printf(" \n Equivalent impedance reffered to secondary side \n Z_02 = %.2f Ω \n", Z_02);