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刚才看UL1727的关于焊接的要求是:& k5 g& h4 d2 b3 Y
18.3.3 With reference to 18.3.2, a lead is considered mechanically secure when one or more of the
4 O" i& ^9 ^; u( S/ [following conditions are met:
/ `* t% t1 b9 da) The lead has at least one full wrap around a terminal.! r- j9 j1 W( ]3 p+ t
b) The lead has at least one right-angle bend when the lead is passed through an eyelet or
6 p3 H/ Q" W4 C8 K1 ]opening." H9 k4 Z+ n3 z! ?( N: A7 _3 D" g
Exception: On a printed-wiring board that is soldered by a machine process in which the
8 ] Z( y) a4 l$ ^soldering time and solder temperature are automatically controlled, bending over of a lead after it
5 ]; d8 D: z4 [6 t! L4 _has been passed through a hole in the board is not required.
4 E/ a6 X2 u% C" a5 h0 k" D8 yc) The lead is twisted with one or more conductors.+ y# I6 ~) y- Q+ M, y$ o: b; F% c
d) The lead is strapped in place, or the equivalent, adjacent to the soldered connection to hold. v; k A2 t* a, `4 u. f9 o& v
the lead end in place.; }% g3 A+ ?9 v8 o! F
5 H6 S2 [0 n+ W9 Z/ M+ ~欧洲的要求是类似的吗? |
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