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+// Example  1.62

+

+clc;clear;close;

+

+// Given data

+format('v',6)

+VL=400;//in volt

+f=50;//in Hz

+I=100;//i Ampere

+

+//calculations

+//D.O.L starter

+IL=I*sqrt(3);//in Ampere

+disp(IL,"(i) The line current for direct on line starting in Ampere : ");

+//In star delta starter

+Vph=VL/sqrt(3);//in Volt

+Iph=I/sqrt(3);//in Ampere

+disp(Iph,"(ii) Starting phase current for star delta starting in Ampere : ");

+disp(Iph,"(ii) Starting line current for star delta starting in Ampere : ");

+//Auto transformer starter

+K=70/100;//tapping of auto transformer

+Vph=VL/sqrt(3);//in Volt

+Vline=K*VL;//in volt

+Ist_phase=Vline*I/VL;//in Ampere

+disp(Ist_phase,"(iii) Starting phase current of motor in Ampere : ");

+Ist_line=Ist_phase*sqrt(3);//in Ampere

+disp(Ist_line,"(iii) Starting line current of motor in Ampere : ");

+IsupplyLine=K*Ist_line;//in Ampere

+disp(IsupplyLine,"(iii) Supply line current of motor in Ampere : ");