richardzhng 发表于 2011-12-12 19:38 6 @/ `5 b% U0 R; J/ o
are you sure it is three phases and one neutral, not three phases and a ground?
+ R t1 l( \ L1 L5 d) u! r0 t. a"are you sure it is three phases and one neutral, not three phases and a ground?" " Z' N7 j6 S( L% u k1 E/ N 4 b$ \4 | e5 _4 A. R . N! q) C6 |# H7 L' VI am sure . Would you gave me some advice? thanks!