richardzhng 发表于 2011-12-12 19:38 $ t) d$ Q8 Y- }$ G! Ware you sure it is three phases and one neutral, not three phases and a ground?
4 L, v* q8 h8 @0 M% Q, Y"are you sure it is three phases and one neutral, not three phases and a ground?" * Q% J% t9 M6 z: W/ w. D ( q5 \% t7 Q' }# ] T& S. I; [( z
I am sure . Would you gave me some advice? thanks!