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+// Electric Machinery and Transformers
+// Irving L kosow 
+// Prentice Hall of India
+// 2nd editiom
+
+// Chapter 12: POWER,ENERGY,AND EFFICIENCY RELATIONS OF DC AND AC DYNAMOS
+// Example 12-17
+
+clear; clc; close; // Clear the work space and console.
+
+// Given data
+// code letter = J of SCIM (Ex.12-16)
+
+// Calculations
+// case a
+// From Appendix A-3,Table 430-7(b),the starting kVA/hp (with rotor locked) is 
+// less than 7.99,which, when substituted in the following equation, yields a
+// maximum starting current of :
+
+// subscript u for I_s indicates upper limit of starting current
+I_s_u = (7.99*(7.5*1000))/(sqrt(3)*220) ;
+
+// case b
+// The lower limit,code letter J,is 7.1 kVA/hp. Thus :
+
+// subscript l for I_s indicates lower limit of starting current
+I_s_l = (7.1*(7.5*1000))/(sqrt(3)*220) ;
+
+// Display the results
+disp("Example 12-17 Solution : ");
+
+printf(" \n a: From Appendix A-3,Table 430-7(b),the starting kVA/hp ");
+printf(" \n    (with rotor locked) is less than 7.99,which, when substituted ");
+printf(" \n    in the following equation, yields a maximum starting current of :");
+printf(" \n    I_s = %.1f A \n",I_s_u);
+
+printf(" \n b: The lower limit,code letter J,is 7.1 kVA/hp.\n    Thus :");
+printf(" \n    I_s = %.1f A ",I_s_l );