本帖最后由 td456 于 2010-2-21 17:29 编辑 4 N1 r+ f/ F h3 ^/ s
) x l% c% i: C- S- T0 N# I, Y( VWhen open a motor connection box, / \) O. g1 C- g2 N. r0 ?6 B
Beside three phase wires for the power, 6 \4 C' z5 K* i' ^We have another two wires marked as P1 and P2- c& f$ p! C7 V6 h+ @
What is that for(P1, P2)? e9 u6 b, i" ~9 i: K) _Most of the time, they are not used. 5 N, |$ u4 k0 r. o" W* A . k7 U2 C8 \: u/ t9 H! C/ V/ F _Thanks!
Good question!6 O- a/ x1 i& t3 d" J8 I3 T5 R- s- |
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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." z6 l+ q, m6 v. [) {. s