richardzhng 发表于 2011-12-12 19:38 7 ~0 r8 }9 A) _+ p. jare you sure it is three phases and one neutral, not three phases and a ground?
3 m" J) c9 L' l+ _6 s% U, Y"are you sure it is three phases and one neutral, not three phases and a ground?" . K4 H( Q, N4 F# D: G' d0 }2 V& C, {, p* h% q6 F* h$ v8 V
$ ?4 Y, K. y, W) \4 cI am sure . Would you gave me some advice? thanks!