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diff --git a/Working_Examples/2777/CH3/EX3.24/Ex3_24.sce b/Working_Examples/2777/CH3/EX3.24/Ex3_24.sce new file mode 100755 index 0000000..e37c3d1 --- /dev/null +++ b/Working_Examples/2777/CH3/EX3.24/Ex3_24.sce @@ -0,0 +1,85 @@ +
+// ELECTRICAL MACHINES
+// R.K.Srivastava
+// First Impression 2011
+// CENGAGE LEARNING INDIA PVT. LTD
+
+// CHAPTER : 3 : TRANSFORMERS
+
+// EXAMPLE : 3.24
+
+clear ; clc ; close ; // Clear the work space and console
+
+
+// GIVEN DATA
+
+VL = 11000; // Line-line voltage of the 3 identical 1-phase Transformer in Volts
+IL = 10; // Line current of the 3 identical 1-phase Transformer in Amphere
+a = 10; // Ratio of trun per phase of the 3 identical 1-phase Transformer
+
+
+// CALCULATIONS
+// For case (a) STAR-STAR
+
+VPp_a = VL/sqrt(3); // Primary phase volatge in Volts
+IPp_a = IL; // Primary phase current in Amphere
+VSp_a = VPp_a/a; // Secondary phase voltage in Volts
+ISp_a = a*IPp_a; // Secondary phase current in Amphere
+ISl_a = ISp_a; // Secondary line current in Amphere
+VSl_a = VSp_a*sqrt(3); // Secondary line voltage in Volts
+Out_a = sqrt(3)*VSl_a*ISl_a/1000; // Output in kVA
+
+// For case (b) STAR-DELTA
+
+VPp_b = VL/sqrt(3); // Primary phase volatge in Volts
+IPp_b = IL; // Primary phase current in Amphere
+VSp_b = VPp_a/a; // Secondary phase voltage in Volts
+ISp_b = a*IPp_b; // Secondary phase current in Amphere
+ISl_b = sqrt(3)*ISp_b; // Secondary line current in Amphere
+VSl_b = VSp_b; // Secondary line voltage in Volts
+Out_b = sqrt(3)*VSl_b*ISl_b/1000; // Output in kVA
+
+// For case (c) DELTA-DELTA
+
+VPp_c = VL; // Primary phase volatge in Volts
+IPp_c = IL/sqrt(3); // Primary phase current in Amphere
+VSp_c = VPp_c/a; // Secondary phase voltage in Volts
+ISp_c = a*IPp_c; // Secondary phase current in Amphere
+ISl_c = sqrt(3)*ISp_c; // Secondary line current in Amphere
+VSl_c = VSp_c; // Secondary line voltage in Volts
+Out_c = sqrt(3)*VSl_c*ISl_c/1000; // Output in kVA
+
+// For case (d) DALTA-STAR
+
+VPp_d = VL; // Primary phase volatge in Volts
+IPp_d = IL/sqrt(3); // Primary phase current in Amphere
+VSp_d = VPp_d/a; // Secondary phase voltage in Volts
+ISp_d = a*IPp_d; // Secondary phase current in Amphere
+ISl_d = ISp_d; // Secondary line current in Amphere
+VSl_d = sqrt(3)*VSp_d; // Secondary line voltage in Volts
+Out_d = sqrt(3)*VSl_d*ISl_d/1000; //Output in kVA
+
+
+// DISPLAY RESULTS
+
+disp("EXAMPLE : 3.24 : SOLUTION :-") ;
+printf("\n For STAR-STAR Connection \n\n (a.1) Secondary line voltage = %.f V \n ",VSl_a);
+printf("\n (a.2) Secondary line current = % .f A \n",ISl_a);
+printf("\n (a.3) Primary phase current = %.f A \n ",IPp_a);
+printf("\n (a.4) Secondary phase current = %.f A \n",ISp_a);
+printf("\n (a.5) Output = %.2f kVA \n ",Out_a);
+printf("\n For STAR-DELTA Connection \n\n (b.1) Secondary line voltage = % .f V \n",VSl_b);
+printf("\n (b.2) Secondary line current = %.f A \n ",ISl_b);
+printf("\n (b.3) Primary phase current = %.f A \n",IPp_b);
+printf("\n (b.4) Secondary phase current = %.f A \n ",ISp_b);
+printf("\n (b.5) Output = % .2f kVA \n",Out_b);
+printf("\n For DELTA-DELTA Connection \n\n (c.1) Secondary line voltage = %.f V \n ",VSl_c);
+printf("\n (c.2) Secondary line current = %.2f A \n",ISl_c);
+printf("\n (c.3) Primary phase current = %.2f A \n ",IPp_c);
+printf("\n (c.4) Secondary phase current = %.1f A \n",ISp_c);
+printf("\n (c.5) Output = %.1f kVA \n ",Out_c);
+printf("\n For DELTA-STAR Connection \n\n (d.1) Secondary line voltage = % .2f V \n",VSl_d);
+printf("\n (d.2) Secondary line current = %.1f A \n ",ISl_d);
+printf("\n (d.3) Primary phase current = %.2f A \n",IPp_d);
+printf("\n (d.4) Secondary phase current = %.1f A \n ",ISp_d);
+printf("\n (d.5) Output = % .1f kVA \n",Out_d);
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