richardzhng 发表于 2011-12-12 19:38 - `& t' O# `0 Q0 X7 Pare you sure it is three phases and one neutral, not three phases and a ground?
5 T6 e$ B4 W t. E; O5 l" v"are you sure it is three phases and one neutral, not three phases and a ground?" - h2 D" G4 F) F; _7 j9 I- _# o7 A& @, M) m9 Z( X" ?# [
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I am sure . Would you gave me some advice? thanks!