richardzhng 发表于 2011-12-12 19:38 : g; Z. o* \, s3 w* {
are 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?" ! r% x/ _3 o/ m* ~, F0 s 9 K7 a/ t% i" h# {5 B) v" D) P/ l% k7 N# e9 _6 Y
I am sure . Would you gave me some advice? thanks!