) x6 z2 C% K. MWhen open a motor connection box, * L* a* d6 f! L3 Y. T6 b, K8 [0 yBeside three phase wires for the power,( D( w. a& j1 r7 m4 w* p1 f
We have another two wires marked as P1 and P27 ], } |0 C5 W* Y$ u4 W
What is that for(P1, P2)?: \/ x" z; c1 p7 M3 ]
Most of the time, they are not used. " a0 }( R8 s+ S& v3 A9 Y + i5 ]& ~ Z' @5 c0 c0 Y1 ]Thanks!
, \0 m, ?9 q4 `3 V5 G0 K# w, RI think the two leads P1 and P2 are for the thermal switch (mostly normal close), use multimeter to check out.* K; B/ ^2 t6 e, O2 p" n