richardzhng 发表于 2011-12-12 19:38 5 |4 n0 F7 Y! T4 C Z- N
are you sure it is three phases and one neutral, not three phases and a ground?
7 p C9 s! P4 J: z8 y V7 L( q"are you sure it is three phases and one neutral, not three phases and a ground?"- [# R# ^( L* g% Y9 U$ a' |
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I am sure . Would you gave me some advice? thanks!