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27.4中:
0 D6 n1 r! ]( C9 M% v. [- O/ P7 R3 i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
$ [# k; B7 K6 x或铝合金的接触而引起的腐蚀危险。* ?" o3 z/ u; m0 Q$ w
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。( N# y3 N' e4 s. C, |9 f! e; Z1 N) R- J4 W
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。 L5 P- i& P8 N; y# L0 }% }5 s
8 W5 [0 N" @2 i: R2 E( K在168A决议中有这么一句话:' S- C5 p, r" ]2 V1 z
- Aluminium and its alloys, provided special measures are taken for removing, where' Q9 x( p, M0 ^' W( F8 m0 F
necessary, the oxide layer, for obtaining a sufficient and durable contact pressure
" [# e" J, T: V) land for ensuring that the point of connection withstands the corrosion test specified;
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4 W8 O" p6 s. X/ q1 |7 H" g* vhowever, until a suitable corrosion test and an electrical performance test are
3 r9 V4 ]1 ~: _6 Z6 i- bavailable, aluminium and its alloys should preferably not be used for current-carrying& [/ t3 ]- }# i5 O
parts and terminals within the equipment.) J P# M% P3 X g
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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