richardzhng 发表于 2011-12-12 19:38 7 L. F- \5 ^2 q+ Q8 I& F H
are you sure it is three phases and one neutral, not three phases and a ground?
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"are you sure it is three phases and one neutral, not three phases and a ground?" ; E. Q1 D) K: R$ k, I 1 h( r0 u* u9 d8 k/ b0 { B: g8 e' o0 R4 u0 f V7 }
I am sure . Would you gave me some advice? thanks!