本帖最后由 td456 于 2010-2-21 17:29 编辑 3 P0 |# b) S) M2 M9 j# E7 Q) c8 _
When open a motor connection box, 2 b% x4 e0 a. R$ Q' E
Beside three phase wires for the power, - `' y `" u9 x" J! RWe have another two wires marked as P1 and P2 - t" w8 o/ H( q, G9 GWhat is that for(P1, P2)?1 O- O+ Z" ~. j) { g# f- V# J+ W- K* C
Most of the time, they are not used. 1 ?) w" f5 z; S0 A2 U' |/ w+ n 4 U! Y/ v% y1 F* t) [Thanks!
Good question! ; U' [5 q8 x% I# n% d3 r9 _% t6 I, E( K& i3 C2 X& f1 \5 u
I think the two leads P1 and P2 are for the thermal switch (mostly normal close), use multimeter to check out.; \ o2 G+ T) M3 t