richardzhng 发表于 2011-12-12 19:38 ! G T' v* }( V8 {# E7 gare you sure it is three phases and one neutral, not three phases and a ground?
0 Z, Y; t' y9 S- A4 }"are you sure it is three phases and one neutral, not three phases and a ground?" 8 j5 m+ `4 G* b9 b- f, L ! e/ p; f: K0 j, Q& ^+ x! K5 v$ e2 a, w# x. @/ z% L Q
I am sure . Would you gave me some advice? thanks!