richardzhng 发表于 2011-12-12 19:38 j$ _6 D! t7 ` F) ?, Yare you sure it is three phases and one neutral, not three phases and a ground?
7 V: _+ V- v+ d9 {/ z"are you sure it is three phases and one neutral, not three phases and a ground?"2 j+ V- |& ~6 x+ D4 F2 q
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I am sure . Would you gave me some advice? thanks!