2 files changed, 28 insertions, 0 deletions
diff --git a/431/CH3/EX3.25/EX3_25.sce b/431/CH3/EX3.25/EX3_25.sce
new file mode 100755
index 000000000..f8ed7ef01
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+++ b/431/CH3/EX3.25/EX3_25.sce
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+//Calculate efficiency of transformer //Chapter 3
+//Example 3.25
+//page 234
+clear;
+clc;
+disp("Example 3.25")
+kVA=500;                //rating of the transformer
+R1=0.4;                //resistance in primary winding inohms
+R2=0.001;              //resistance in secondary winding in ohms
+V1=6600;                //primary voltahe in volts
+V2=400;                 //secondary voltage in volts
+ironloss=3;              //iron loss in kilowatt
+pf=0.8;                  //power factor lagging
+I1=(kVA*1000)/V1;              
+printf("\nPrimary winding current=%fA",I1);
+I2=(I1*V1)/V2;
+printf("\nSecondary winding current=%fA",I2);
+Culoss=((I1^2*R1)+(I2^2*R2));
+printf("\nCopper losses in the two winding=%fWatts",Culoss);
+effi=(kVA*pf*100)/((kVA*pf)+ironloss+(Culoss/1000));
+printf("\nEfficiency at 0.8 p.f=%fpercent",effi);
diff --git a/431/CH3/EX3.25/resultEX3_25.txt b/431/CH3/EX3.25/resultEX3_25.txt
new file mode 100755
index 000000000..a5025c26e
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+++ b/431/CH3/EX3.25/resultEX3_25.txt
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+  
+ Example 3.25   
+
+Primary winding current=75.757576A
+Secondary winding current=1250.000000A
+Copper losses in the two winding=3858.184114Watts
+Efficiency at 0.8 p.f=98.314355percent 
+\ No newline at end of file