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diff --git a/380/CH11/EX11.7/Ex11_7.sce b/380/CH11/EX11.7/Ex11_7.sce
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+//Caption:Find the rms value of symmetric subtransient and transient currents
+//Exa:11.7
+clc;
+clear;
+close;
+KVA=71500;//Kilo Volt-Ampere
+V_r=13800;//in Volts
+X_af=0.57;//in per unit
+X_la=0.125;//in per unit
+X_lf=0.239;//in per unit
+X_ld=0.172;//in per unit
+X_ds=X_la+((X_af*X_lf*X_ld)/(X_lf*X_ld+X_af*X_ld+X_af*X_lf));//subtransient reactance(in per unit)
+E_phy=1;//generated voltage (in per unit)
+I_ds=E_phy/X_ds;//short circuit current (in per unit)
+X_d=X_la+((X_af*X_lf)/(X_af+X_lf));//transient reactance (in per unit)
+I_d=E_phy/X_d;//transient current (in per unit)
+I_rated=KVA*1000/(sqrt(3)*V_r);//in Amperes
+I_dsa=I_ds*I_rated;//sub transient current (in Amperes)
+disp(I_dsa,'sub-transient current (in Amperes)=');
+I_da=I_d*I_rated;//transient current (in Amperes)
+disp(I_da,'transient current (in Amperes)=');
+\ No newline at end of file