1 files changed, 20 insertions, 0 deletions
diff --git a/3760/CH6/EX6.55/Ex6_55.sce b/3760/CH6/EX6.55/Ex6_55.sce
new file mode 100644
index 000000000..07e3fee52
--- /dev/null
+++ b/3760/CH6/EX6.55/Ex6_55.sce
@@ -0,0 +1,20 @@
+clc;
+v=440; // rated voltage of distribution circuit
+im=1200; // maximum current that can be supplied
+n=0.85; // efficiency of induction motor
+pf=0.8; // power factor of motor
+ir=5; // ratio of starting current to full load current
+disp('case a');
+il=im/ir; //rated line current
+p=sqrt(3)*v*il*n*pf; 
+printf('Maximum KW rating is %f KW\n',p/1000);
+disp('case b');
+x=0.8; // rated of applied voltage and stepped down voltage
+il=im/(x^2*ir); //rated line current
+p=sqrt(3)*v*il*n*pf; 
+printf('Maximum KW rating is %f KW\n',p/1000);
+disp('case c');
+// star-delta converter is same as autotransformer starter with 57.8 % tapping therefore
+il=im/(0.578^2*ir); //rated line current
+p=sqrt(3)*v*il*n*pf; 
+printf('Maximum KW rating is %f KW\n',p/1000);