[FIDOCAD]
FJC C 1.5
FJC B 0.5
TY 22 25 5 3 0 0 0 * Qc=PC*tg phi-->PC=Qc/(tg phi)=600/0,75=800w
TY 22 15 5 3 0 0 0 * cos phi=0,8 --> tg phi=0,75
TY 22 30 5 3 0 0 0 * PC=1,73*V*Ic*cos phi-->Ic=PC/(1,73*V*cos phi)=800/(1,73*380*0,8)=1,521A
TY 22 35 5 3 0 0 0 * PR=3*R*Ic^2=3*12*1,521^2=83,284w
TY 22 40 5 3 0 0 0 * VR=R*Ic=12*1,521=18,25V
LI 18 54 222 54 2
LI 216 44 216 44 2
TY 42 62 4 3 0 0 2 Times++New++Roman No, non si sommano aritmeticamente: le due tensioni non sono in fase
TY 22 51 5 3 0 1 15 * VR'=(V/1,73+VR/1,73)*1,73=(380/1,73+18,25/1,73)*1,73=398,25V