本帖最后由 td456 于 2010-2-21 17:29 编辑 8 `# e: o+ w. Q. k. ~5 U- C
t! _* A1 O3 `3 l* o% R. wWhen open a motor connection box, . `% `) O3 | f# J; ~1 k& R% L
Beside three phase wires for the power, 5 |" r4 C) W, |' H# PWe have another two wires marked as P1 and P2 8 }# x1 f! L8 l0 VWhat is that for(P1, P2)? $ h2 J7 m9 L- o4 e, aMost of the time, they are not used. 5 O* g' ^" {. z0 j : K' X& h! K/ k, g) JThanks!
Good question! 3 c5 C0 w2 s& ~: {% ^" }- y5 O. b% a" z1 z$ S* Q0 V G- P
I think the two leads P1 and P2 are for the thermal switch (mostly normal close), use multimeter to check out.+ t% Z+ R# R" F: a