sharkxiao 发表于 2012-8-16 08:53 # g/ i# V# u% }1 A K) B2 X
没有要求哪些要固定的,如果不固定会影响产品结构和可靠性的需要固定,如会影响电气间隙和爬电距离,或者如 ...
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说的有道理。作者: BV211 时间: 2012-8-16 14:26
终于找到这要求了, 见下面条款. 所以电源输入输出线,变压器次级引出线除了焊在PCB 上面,也要加胶固定.4 B) q& S* h# V; [5 L/ s
3.1.9 Termination of conductors 6 d) X$ {! ?3 _3 J# gConductors shall be provided with a means (for example, barriers or fixing), or be so terminated, 3 s U7 W' c* V+ Y& A& _that they and their terminators (for example, ring terminals and flat quick-connect terminals)+ v) ? [: l2 }$ I2 \& O
cannot, in normal use, become so displaced that CLEARANCES or CREEPAGE DISTANCES are reduced to . q( u3 Q4 j, ?% K7 Sless than the values specified in 2.10 (or Annex G). ) w" D6 M; {9 g4 B0 v9 p# K: k# T/ yIt is permitted to use soldered, welded, crimped, screwless (push-in) and similar terminations for A7 m" ^, X. X* [the connection of conductors. For soldered terminations, the conductor shall be positioned or / e3 d/ p/ a1 zfixed so that reliance is not placed upon the soldering alone to maintain the conductor in 2 E- R' a1 j! M/ y" d( oposition.作者: ricky_yu 时间: 2012-8-16 14:46
过孔焊或钩焊就满足了。除非你直接焊在板子一个面上。作者: BV211 时间: 2012-8-16 15:03
过孔焊不行吧? 要钩焊呀.