本帖最后由 td456 于 2010-2-21 17:29 编辑 4 W8 |' r3 X7 o) \1 L
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When open a motor connection box, + I0 J" m, M& j J; m
Beside three phase wires for the power,5 G( Y @3 f. x( h
We have another two wires marked as P1 and P2( V8 h4 t3 g& F3 E; G0 [5 D
What is that for(P1, P2)? / T& _+ K$ H+ C9 R* ?9 Z0 p& v7 B; jMost of the time, they are not used. n% W1 q: Z* \2 M( _ ; C; W+ {( E( k% vThanks!
Good question!* q z1 v, H w. `. g
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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. B3 W: J( N9 w( ]) X
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Try the following website for details:3 m L/ W8 f& ^' Y) | http://www.fine-ny.com/pdfs/Fuji-Electrical-Apps.pdf