richardzhng 发表于 2011-12-12 19:38 ; t3 p- ?* R9 R
are you sure it is three phases and one neutral, not three phases and a ground?
8 H$ P) y3 X1 a6 V9 S; n* ]"are you sure it is three phases and one neutral, not three phases and a ground?" : q8 m ]; b' M! `0 _) t 5 P5 @8 @# r6 v3 B `6 p3 F2 D; o
I am sure . Would you gave me some advice? thanks!