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+// Example 2.11
+// Computation of transformer regulation
+// Page No. 71
+
+clc;
+clear;
+close;
+
+// Given data
+S=10;                  // Transformer actual rating 10KVA
+Srated=25;             // Rated 25KVA
+PF=0.65;               // Power factor lagging
+RPU=0.0124;            // Percent resistance drop
+XPU=0.014;             // Percent reactance drop
+
+// Transformer regulation
+SPU=S/Srated;
+SPU=SPU*100;
+Theta=acosd(PF);
+// Transformer regulation          
+RegPU=sqrt( ( (RPU*SPU+PF)^2)+  ((XPU*SPU+sind(Theta))^2))-1;
+// Transformer regulation in percentage
+RegPU_Per=RegPU*100;
+
+// Display result on command window
+printf("\n Transformer regulation = %0.3f ",RegPU);
+printf("\n Transformer regulation in percentage= %0.1f ",RegPU_Per);
+
+// Answer varies due to round off errors