richardzhng 发表于 2011-12-12 19:38 & d2 \- e& i! w
are you sure it is three phases and one neutral, not three phases and a ground?
, ?* r3 t, T9 U9 M$ d
"are you sure it is three phases and one neutral, not three phases and a ground?": T4 d$ k0 w0 l
, e9 a6 X4 c- N* O# L S9 b4 N: q4 b& e0 X
, R% _, O0 |9 ?: q
I am sure . Would you gave me some advice? thanks!