单项选择题


The connections of two sets of three phase load is shown in the figure. The three phase source is balanced. Line voltage is U˙AB=380∠30oV and the impedance are Z1=100+j60Ω, Z2=50−j80Ω.

The value of A phase current I˙

A.dc
B.even sine
C.even cosine
D.odd sine
E.odd cosine
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