richardzhng 发表于 2011-12-12 19:38 F# |$ E f* s( H" Lare 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?" : S* X, e$ m7 Y3 g: g# |+ @) y% \/ K $ j7 H' H& I2 P- O; W* s" }6 B4 u4 R5 e% u4 Z5 I0 b
I am sure . Would you gave me some advice? thanks!