richardzhng 发表于 2011-12-12 19:38 1 a- c3 z+ G2 D& G8 Lare you sure it is three phases and one neutral, not three phases and a ground?
r! q& q2 C+ y! T0 D9 D"are you sure it is three phases and one neutral, not three phases and a ground?" ) L+ v2 Y# q W ; @* [: ?3 t! |* |0 m' y1 i$ V% R: l1 r3 k9 R
I am sure . Would you gave me some advice? thanks!