richardzhng 发表于 2011-12-12 19:38 , f0 }) T- T6 Rare 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?"1 S7 v1 n$ ]) t, O# ?
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/ G+ A9 N3 k; ]( O' hI am sure . Would you gave me some advice? thanks!