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diff --git a/83/CH2/EX2.7/example_2_7.sce b/83/CH2/EX2.7/example_2_7.sce
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+//Chapter 2
+//Example 2.7
+//page 69
+//To find inductive reactance of for the three phase bundled conductors
+clear;clc;
+r=0.01725; //radius of each conductor
+//from the figure we can declare the distances
+d=7;
+s=0.4;
+//Mutual GMD between bundles of phases a and b
+Dab=(d*(d+s)*(d-s)*d)^(1/4);
+//Mutual GMD between bundles of phases b and c
+Dbc=Dab ; //by symmetry
+//Mutual GMD between bundles of phases c and a
+Dca=(2*d*(2*d+s)*(2*d-s)*2*d)^(1/4);
+//Equivalent GMD is calculated as
+Deq=(Dab*Dbc*Dca)^(1/3);
+//self GMD is given by
+Ds=(0.7788*1.725*10^(-2)*0.4*0.7788*1.725*10^(-2)*0.4)^(1/4);
+//Inductive reactance per phase is given by
+Xl=2*%pi*50*10^(-3)*0.461*log10(Deq/Ds); //10^(-3) because per km is asked
+printf("\n\nMutual GMD between bundles of phases a and b = %0.3fm\n\n",Dab);
+printf("Mutual GMD between bundles of phases b and c = %0.3fm\n\n",Dbc);
+printf("Mutual GMD between bundles of phases c and a = %0.3fm\n\n",Dca);
+printf("Equivalent GMD = %0.3fm\n\n",Deq);
+printf("Self GMD of the bundles = %0.3fm\n\n",Ds);
+printf("Inductive reactance per phase = %0.3f ohms/km\n\n",Xl);
+
+//now let us compute reactance when center to centerr distances are used
+Deq1=(d*d*2*d)^(1/3);
+Xl1=2*%pi*50*0.461*10^(-3)*log10(Deq1/Ds);
+printf("\n When radius of conductors are neglected and only distance between conductors are used, we get below results:\n\n");
+printf("Equivalent mean distance is = %f\n\n",Deq1);
+printf("Inductive reactance per phase = %0.3f ohms/km\n\n",Xl1);
+
+//when bundle of conductors are replaced by an equivalent single conductor 
+cond_dia=sqrt(2)*1.725*10^(-3); //conductor diameter for same cross-sectional area
+Xl2=2*%pi*50*0.461*10^(-3)*log10(Deq1/cond_dia);
+printf("\nWhen bundle of conductors are replaced by an equivalent single conductor:\n\n");
+printf("Inductive reactance per phase = %0.3f ohms/km\n\n",Xl2) ;
+percentage_increase=((Xl2-Xl1)/Xl1)*100;
+printf("This is %0.2f higher than corresponding value for a bundled conductor line.",percentage_increase);
+
diff --git a/83/CH2/EX2.7/results_example_2_7.txt b/83/CH2/EX2.7/results_example_2_7.txt
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+ 
+
+
+Mutual GMD between bundles of phases a and b = 6.994m
+
+Mutual GMD between bundles of phases b and c = 6.994m
+
+Mutual GMD between bundles of phases c and a = 13.997m
+
+Equivalent GMD = 8.814m
+
+Self GMD of the bundles = 0.073m
+
+Inductive reactance per phase = 0.301 ohms/km
+
+
+ When radius of conductors are neglected and only distance between conductors are used, we get below results:
+
+Equivalent mean distance is = 8.819447
+
+Inductive reactance per phase = 0.301 ohms/km
+
+
+When bundle of conductors are replaced by an equivalent single conductor:
+
+Inductive reactance per phase = 0.515 ohms/km
+
+This is 71.04 higher than corresponding value for a bundled conductor line.