对称三相交流电路,电源线电压380V,每相负载中R=16Ω,XL= 12Ω,Y连接,求相电压、相电流、线电流及三相

Z =（ R*R +X*X）^0。5 = 20 ΩY接：相电压 U = 380/ 根号3 = 220 V相电流 I = U / Z = 220 / 20 = 11 A线电流 = 相电流 = 11 A三相视在功率（容量）S = 根号3 * 线电压 * 线电流 = 根号3 * 380 * 11 = 7240 VA三相有功功率 P = 3 * I * I * R = 3 * 11 * 11 * 16 =5808 W