richardzhng 发表于 2011-12-12 19:38 1 V0 Z- t+ f5 R7 J1 M
are you sure it is three phases and one neutral, not three phases and a ground?
2 ~; u% z4 c- V4 N$ m, l$ a"are you sure it is three phases and one neutral, not three phases and a ground?" ; q9 c* g# C- ?/ h 7 L# E% R5 z2 G5 ^0 W& B( L5 {
I am sure . Would you gave me some advice? thanks!