richardzhng 发表于 2011-12-12 19:38 & r" g6 a' c3 z: P% G# Tare you sure it is three phases and one neutral, not three phases and a ground?
; m a2 C) ~) n# o"are you sure it is three phases and one neutral, not three phases and a ground?", F! {" H9 Y3 {* ^+ f
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I am sure . Would you gave me some advice? thanks!