richardzhng 发表于 2011-12-12 19:38 ; G. q, T2 M% d# |6 w
are you sure it is three phases and one neutral, not three phases and a ground?
, b( G7 U7 b/ a" v( X"are you sure it is three phases and one neutral, not three phases and a ground?" 3 i$ l6 g# R# {9 x/ e& D$ v+ w$ @8 ^0 Y+ i: b
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I am sure . Would you gave me some advice? thanks!