richardzhng 发表于 2011-12-12 19:38 6 M8 Q( O% H8 _7 t- E ^9 z, V
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?"" J- B, ]4 S+ t7 b, V
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% n$ r7 D: a/ ?- o5 ` l, o' }' uI am sure . Would you gave me some advice? thanks!