richardzhng 发表于 2011-12-12 19:38 / t! c* `; {% b" l" Eare you sure it is three phases and one neutral, not three phases and a ground?
6 A& J3 d% S) F& ^6 f5 [
"are you sure it is three phases and one neutral, not three phases and a ground?"! b! c$ P: h: _
% O/ J. i _3 ~5 ^. Q6 r
+ f* n$ Y) _5 M; \
I am sure . Would you gave me some advice? thanks!