richardzhng 发表于 2011-12-12 19:38 & Y4 z) g+ e) H0 a% l5 zare you sure it is three phases and one neutral, not three phases and a ground?
6 z1 ^; b4 W% Z/ ^3 O6 Z2 Q"are you sure it is three phases and one neutral, not three phases and a ground?" ( R8 D4 |$ \8 \& E& t: ?0 l z6 x$ X# F, a; e" e; d
+ k- J9 n: P( \! t) L! }
I am sure . Would you gave me some advice? thanks!