本帖最后由 td456 于 2010-2-21 17:29 编辑 : Y" R7 m3 {( h4 d- S& ~( _ \; C 9 H+ l0 @ s. w/ h, A# g. QWhen open a motor connection box, ) \. r4 z. F0 s: @
Beside three phase wires for the power,) F1 v7 J. W" Y* |: C6 J8 q
We have another two wires marked as P1 and P2 0 `0 g5 t6 b" A7 n5 uWhat is that for(P1, P2)?0 | ~6 D: `- ~2 ^4 ?. A
Most of the time, they are not used.0 i2 e8 O2 k6 f' z3 t# _7 i
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Thanks!
Good question! ; A s# `8 I s: R0 ~7 s& H 5 c# L% Q8 e" J( KI think the two leads P1 and P2 are for the thermal switch (mostly normal close), use multimeter to check out.# q3 e0 P4 W$ `