richardzhng 发表于 2011-12-12 19:38 4 T+ _( a4 G. r, h0 c+ u; z; jare 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?" 5 W& e6 K+ J- d! K# ` % h% ~$ d4 `$ [& Q5 p! J3 x) c# x+ Y+ E [$ o
I am sure . Would you gave me some advice? thanks!