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//Chapter 20, Problem 11
clc;
Po = 12750; // in Watts
pf = 0.77; // power factor
eff = 0.85;
VL = 415; // in Volts
//calculation:
//eff = power_out/power_in
Pi = Po/eff
//Power P = VL*IL*(3^0.5)*cos(phi) or P = 3*Ip*Ip*Rp)
IL = Pi/(VL*(3^0.5)*pf) // line current
//For a delta connection:
//IL = Ip*(3^0.5)
Ip = IL/(3^0.5)
printf("\n\n (a)Power input = %d W",Pi)
printf("\n\n (b)Line current = %.2f A",IL)
printf("\n\n (c)Phase current = %.2f A",Ip)
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