本帖最后由 td456 于 2010-2-21 17:29 编辑 ! q3 X3 q; L6 ?/ y; a' l- t3 G6 z. { 6 k" J4 ?8 Y* JWhen open a motor connection box, 2 |3 ?8 o8 R2 l1 O. i: \4 s7 XBeside three phase wires for the power, & I0 N* n) t# p2 f' K- \We have another two wires marked as P1 and P2 / R9 E3 f( p+ ~5 B VWhat is that for(P1, P2)?3 Y& E! E# r8 S# o
Most of the time, they are not used. / d: a4 L" S1 [) b. a+ E1 [+ I- v' j+ }- A1 p
Thanks!
Good question!9 k: ~$ B! d' ~ E& ~" I# x. 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.: u7 K& H0 U! M* H/ U0 J