本帖最后由 td456 于 2010-2-21 17:29 编辑 4 {# q4 V4 T8 t) C5 y 3 w. \8 F3 O1 L ~When open a motor connection box, 8 F: q4 Y: w- {. i5 F$ RBeside three phase wires for the power, : C! A5 _7 e; c3 Z( H! Y5 vWe have another two wires marked as P1 and P2* L X$ E$ _9 H* T+ K
What is that for(P1, P2)? ! k, t& S: N, u+ Z6 m/ NMost of the time, they are not used. 0 U$ O7 o% W5 A* R, e3 S4 W p5 W- n3 e& T8 ?8 k% LThanks!
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Just for temperature monitoring!6 O9 z" s( E. o/ b6 @2 z3 E
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Good question! ) }- C5 m. {5 h+ S . s2 Z' K& ?6 n1 c2 a& L- n0 GI think the two leads P1 and P2 are for the thermal switch (mostly normal close), use multimeter to check out.* T/ x# @8 N& X6 L" W1 ?