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【单选题】
每相负载均为电阻6Ω,感抗8Ω的三相对称负载作连接,接到线电压为380V的三相电源上,已知Uuv=380 sin314tV,则U相负载电流的瞬时值表达式为A.
i u =38 sin(314t-30°)A
B.
i u =22 sin(314t+6.9°)A
C.
i u =22 sin314tA
D.
i u =22 sin(314t-83.1°)A
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