本帖最后由 td456 于 2010-2-21 17:29 编辑 ; R7 @- P9 n4 B" [9 w6 M9 H1 J3 H! @7 ~, n4 Q8 Q9 F& ^& N8 [& R
When open a motor connection box, 6 @! F7 O' _2 ~' ?) tBeside three phase wires for the power,5 |" ]. d: P# v8 U
We have another two wires marked as P1 and P2- ]' V0 m3 k6 c# I: O6 Q7 \
What is that for(P1, P2)? J- t. A, b" h+ j, {
Most of the time, they are not used. 1 i K$ ^9 c3 V4 M5 u6 y, i7 ^! ^3 D* k* a: s
Thanks!