richardzhng 发表于 2011-12-12 19:38 . M6 B) a2 J, C
are you sure it is three phases and one neutral, not three phases and a ground?
7 G5 v' I6 O2 S8 _0 [
"are you sure it is three phases and one neutral, not three phases and a ground?" # @/ |* u+ w2 v: ~ / b0 w0 f2 l% }" Z: t0 `7 m, b# O7 W
I am sure . Would you gave me some advice? thanks!