本帖最后由 td456 于 2010-2-21 17:29 编辑 , D; m( d* ]( s7 Y, P6 j7 L0 V j7 E7 O
When open a motor connection box, & y/ X; J3 m* V
Beside three phase wires for the power, ' n0 ~8 F p( TWe have another two wires marked as P1 and P2 ( H. c& N3 ~8 J7 }& }6 IWhat is that for(P1, P2)?3 _. P1 g5 j. l, Q. v
Most of the time, they are not used. 2 t+ U, a6 n9 D/ m 0 V/ i# \: p, j0 E& HThanks!
Good question!6 d6 A M2 T2 A' U6 p
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I think the two leads P1 and P2 are for the thermal switch (mostly normal close), use multimeter to check out.6 E7 g0 G5 T/ C i! Q
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Try the following website for details: 0 _. p/ I4 j( F! [http://www.fine-ny.com/pdfs/Fuji-Electrical-Apps.pdf