richardzhng 发表于 2011-12-12 19:38 5 k3 P3 v/ x, Q1 h4 c* t
are you sure it is three phases and one neutral, not three phases and a ground?
. V5 @& Q! |: i4 P: j, @"are you sure it is three phases and one neutral, not three phases and a ground?" 9 _, n6 ]2 G+ ?+ k3 r* G' ?9 B 5 F7 J' M s! u, D w) c* c% D1 B ; R# |# E' H5 q, bI am sure . Would you gave me some advice? thanks!