本帖最后由 td456 于 2010-2-21 17:29 编辑 , ^+ J, K' ~" m7 Y! W
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When open a motor connection box, + Z! N* r8 Y) c3 _! @) yBeside three phase wires for the power,; ?/ W# R6 T7 n1 l! K0 G" b8 k
We have another two wires marked as P1 and P2 , T" v4 {9 R9 I) p; @4 o- GWhat is that for(P1, P2)? ' f1 [9 e2 e5 F6 K, {% `Most of the time, they are not used. - Z$ k& V4 e. n1 u5 n/ T% K1 d, X+ @2 Z8 I( ^
Thanks!
Good question! " [# A2 C: Z. r3 } + U+ S' y0 O; W; `! ^I think the two leads P1 and P2 are for the thermal switch (mostly normal close), use multimeter to check out.& `" S& I! f. i