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本帖最后由 td456 于 2010-2-21 17:29 编辑 # f {) q7 v. u; x
" x% Q$ G% G, {/ _( P1 g$ w" x8 g0 oWhen open a motor connection box, 1 {+ S6 D; C: J' V" K, t# P1 a
Beside three phase wires for the power,
1 H+ e* x* R: [We have another two wires marked as P1 and P2
7 u. U# U1 A' d: G; U. ^, u: oWhat is that for(P1, P2)?: R0 P% A; f* \' Y$ A/ I: |( g
Most of the time, they are not used.6 R; `% C8 q! t7 {" g0 H" @& |0 x
# ` p0 h, d2 f. b, q2 r4 _+ J( H
Thanks! |
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