richardzhng 发表于 2011-12-12 19:38 " ?: }0 X9 ?% s/ tare you sure it is three phases and one neutral, not three phases and a ground?
% W! {+ }9 w4 A# P7 C8 b: n"are you sure it is three phases and one neutral, not three phases and a ground?" % G5 H; l& X: S8 m6 @ n$ o4 n- F R& ?3 E/ x, v6 Y9 ]
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I am sure . Would you gave me some advice? thanks!