本帖最后由 td456 于 2010-2-21 17:29 编辑 8 G: u& g% P. E) C: Q3 m
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When open a motor connection box, ! l; V- Z" i7 UBeside three phase wires for the power,1 S" R2 i( c; x/ u
We have another two wires marked as P1 and P2" o1 Q. [9 e- b4 V' Y0 {1 @0 {
What is that for(P1, P2)? 7 `0 Q4 @7 R0 E' S C* u3 @Most of the time, they are not used.2 ~* [* [- p/ z( J$ j( q
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Thanks!
Good question! - A% j: l$ C- E6 e! h# ^/ z! }1 r" l- _' Y
I think the two leads P1 and P2 are for the thermal switch (mostly normal close), use multimeter to check out.' J" G, m' y W( K