richardzhng 发表于 2011-12-12 19:38 ; t# |: ~; v: W4 c$ [
are you sure it is three phases and one neutral, not three phases and a ground?
6 H/ B0 Q$ U" ]"are you sure it is three phases and one neutral, not three phases and a ground?" 2 L: K2 r5 e- l/ o/ N 4 s. I T, J; K& x; n* }8 q5 t% z8 W5 N6 N$ p Z3 s
I am sure . Would you gave me some advice? thanks!