richardzhng 发表于 2011-12-12 19:38 4 d( r$ n- c2 @' ?4 S* I0 U" t; T/ @( u' ^are you sure it is three phases and one neutral, not three phases and a ground?
' y, D7 U( o% Z ?6 B; T0 }8 V6 [# s
"are you sure it is three phases and one neutral, not three phases and a ground?" ' r3 U+ D6 ^9 O* @! y! Z7 } I0 i( T+ S: N$ W0 ^* Z! G
3 c4 E# B4 s, D
I am sure . Would you gave me some advice? thanks!