richardzhng 发表于 2011-12-12 19:38 * Z+ X& Y3 K, [4 B. E, sare you sure it is three phases and one neutral, not three phases and a ground?
. W' G- [+ p* Z# F2 o+ V8 X5 N1 u8 T" a"are you sure it is three phases and one neutral, not three phases and a ground?"; g& t7 a" o, A
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( `5 _- `' f6 @" fI am sure . Would you gave me some advice? thanks!