richardzhng 发表于 2011-12-12 19:38 ! B- C2 Q4 d4 `; `, V3 O
are you sure it is three phases and one neutral, not three phases and a ground?
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"are you sure it is three phases and one neutral, not three phases and a ground?" / p4 i6 r( J& @# O1 [+ Y- w: v 7 A4 I# A' {. B v+ D7 U; E2 g5 B - F, t" i* z0 U1 R, d) J. |' cI am sure . Would you gave me some advice? thanks!