richardzhng 发表于 2011-12-12 19:38 4 }* G/ r; r* P- q- Y# g' d& z7 s
are you sure it is three phases and one neutral, not three phases and a ground?
- c- w& z7 B3 W2 _"are you sure it is three phases and one neutral, not three phases and a ground?" & G: z' T' O! l& u3 O 6 Q- m: N# v5 n0 E' Z 5 |7 v9 E/ n \6 l* e! DI am sure . Would you gave me some advice? thanks!