本帖最后由 td456 于 2010-2-21 17:29 编辑 0 d8 _" |# n* j
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When open a motor connection box, . T8 B: Y. P& s9 G6 ?! j+ DBeside three phase wires for the power, - K$ F; q% o9 A) u. C1 J7 z% _8 ]. |We have another two wires marked as P1 and P2" X$ r+ K" L8 S7 S
What is that for(P1, P2)?: S1 c t' R( `) a3 h
Most of the time, they are not used. - @$ F" Y" |' y9 H( \ / C: @! S* z) i; l' F XThanks!
Good question! ( O% K/ m+ t9 A5 i1 m8 t * f: l" S8 }2 s2 s, {* d4 j$ BI think the two leads P1 and P2 are for the thermal switch (mostly normal close), use multimeter to check out., d3 }% G$ M% C( P$ L/ I# {