richardzhng 发表于 2011-12-12 19:38 5 }( m8 h2 o* F" r6 D
are you sure it is three phases and one neutral, not three phases and a ground?
! B; {' B8 Y' {0 ^# [5 f# e; o"are you sure it is three phases and one neutral, not three phases and a ground?"' n6 A0 P* ?7 m3 j' R% O. k
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I am sure . Would you gave me some advice? thanks!