richardzhng 发表于 2011-12-12 19:38 * m4 o. o! |& F" jare you sure it is three phases and one neutral, not three phases and a ground?
8 `5 h( t% c% |, j9 B; `& T"are you sure it is three phases and one neutral, not three phases and a ground?" ! P( v9 `: s" N' C( j) c ~3 L% H% ?# t
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I am sure . Would you gave me some advice? thanks!