本帖最后由 td456 于 2010-2-21 17:29 编辑 , \) [$ q, [+ u6 q5 m
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When open a motor connection box, 0 a2 |/ {( V cBeside three phase wires for the power, 7 z8 w8 Z; s& m3 z) F9 uWe have another two wires marked as P1 and P29 ?7 ]8 h, j2 O' B* U. ?
What is that for(P1, P2)?! Q; @7 O* u. i) F4 x. ~
Most of the time, they are not used. / k1 s$ U0 S# h- g2 u Z " y, a$ F& E, L4 H8 w( g4 G* aThanks!
Good question!" m# f3 t7 @ c3 F
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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., H b1 D0 w$ `5 H; U# m( Y