richardzhng 发表于 2011-12-12 19:38 * @7 g# q$ _0 L( Dare you sure it is three phases and one neutral, not three phases and a ground?
9 Y9 s( n0 i! B2 k6 |' U3 w"are you sure it is three phases and one neutral, not three phases and a ground?" 3 {+ X* S6 O" E + ?9 V) {, o$ P, s# ~. y0 B3 m& H& b
I am sure . Would you gave me some advice? thanks!