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27.4中:
( _! T/ h! ^& v& V如果接地端子的主体是铝或铝合金制造的框架或外壳的一部分,则应采取预防措施以避免由于铜与铝" Y: f9 C8 v6 |- Q9 E
或铝合金的接触而引起的腐蚀危险。
& r6 w% d8 s/ N( P这里没区分是作为接地连续性还是作为接触压力的部件。因此铝和铜直接接触可能会引起不符合吧。8 |9 A6 p* ~5 z) j' }& \9 q
铆接只要不是圆形的本身是可以接受的,楼主目前还有铝和铜材料的问题。# L) B% |4 m9 W
% }6 P d7 O: j/ f, h$ ?) g$ C
在168A决议中有这么一句话:, ^; v5 Y5 v2 g5 c5 w- I% {2 d
- Aluminium and its alloys, provided special measures are taken for removing, where1 G" R0 W7 X: {# b2 y
necessary, the oxide layer, for obtaining a sufficient and durable contact pressure
$ r; D* S1 b; q, s3 `# Fand for ensuring that the point of connection withstands the corrosion test specified;% c) z2 ~$ E8 T; N% O9 j1 i# p
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however, until a suitable corrosion test and an electrical performance test are+ F N" w& K3 E; V: F
available, aluminium and its alloys should preferably not be used for current-carrying
' g4 u! r: B; B: s U: fparts and terminals within the equipment.5 o, u3 c" Y- `% L" j
然而,除非合适的耐腐性测试和电性能测试证明其有效,否则,铝及其合金应该最好不要用于器具的带电部件和连接端子。 |
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