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+//To provide time current grading .
+clear
+clc;
+Isec1=4000/40;// secondary current(amps)
+PSM=100/5;// PSM if 100% setting is used
+Isec2=4000/40;
+PSM2=100/6.25;//PSM if setting used is 125%
+TMSb=.72/2.5;
+PSM1=5000/(6.25*40);
+to=2.2;
+tb=to*TMSb;
+PSMa=5000/(6.25*80);
+TMS=1.138/3;
+PSMa1=6000/(6.25*80);
+ta=(2.6*.379);
+mprintf("Actual operating time of realy at b=%.3f sec. \n",tb);
+mprintf("Actual operating time of realy at a=%.3f sec. \n",ta);