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27.4中:
. N" N- Q$ i" j/ 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
1 K5 ~" l0 k, [或铝合金的接触而引起的腐蚀危险。* h) |4 h1 @& i" E- G/ j
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。
7 x7 G# U$ z+ {: u+ r; n4 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。
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0 C8 t$ ~, Z4 T. s在168A决议中有这么一句话:9 y3 W& d; j- H7 A/ H. Z r2 \/ P
- Aluminium and its alloys, provided special measures are taken for removing, where7 G( X4 U! O4 e- B- @' ^% [
necessary, the oxide layer, for obtaining a sufficient and durable contact pressure9 K' y# N- ^( B9 H3 j
and for ensuring that the point of connection withstands the corrosion test specified;9 x8 y% F; O5 u- p
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however, until a suitable corrosion test and an electrical performance test are6 H6 [' m8 r Y% L7 k. C. h
available, aluminium and its alloys should preferably not be used for current-carrying4 Q4 j5 r. e8 I* d# m
parts and terminals within the equipment./ j, q; V; a6 v+ |" R2 @! `
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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