Y型连接的三相对称负载,每相等效阻抗I=29+21.8JΩ,接到线电压为380v的三相电源上,求负载相电流

Y连接,线电压380V,相电压为220V,阻抗Z = (29*29+21.8*21.8)^0.5=36.3 Ω
相电流 I = U / Z = 220/36.3 = 6.06 A
功率因数:cosa = R / Z = 29 / 36.3 = 0.8
三相负载的有功功率：P = 3*I*I*R =3*6.06*6.06*29 = 3195 W