(2016•山东) 星形连接的三相电源，A相电压为\( {u}_{A}=220\sqrt{2}\mathit{sin}(\omega t+{0}^{°})V\)，线电压\( {u}_{BC}\)等于( )
A.\( 220\sqrt{2}sin(\omega t+30°)V\)
B.\( 380\sqrt{2}sin(\omega t-90°)V\) C.\( 220\sqrt{2}\mathit{sin}(\omega t-3{0}^{°})V\) D.\( 380\sqrt{2}\mathit{sin}(\omega t+9{0}^{°})V\)
