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27.4中:
9 v2 V: _3 |( J. o( }& W K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& a1 n* W& S" }
或铝合金的接触而引起的腐蚀危险。
3 A0 F# }3 v; B0 P" ? R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 H5 v' N/ ~) T% V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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3 L1 ?$ B( y; Y C9 p在168A决议中有这么一句话:( m' f6 X4 P- r" B& z
- Aluminium and its alloys, provided special measures are taken for removing, where1 p+ v& u; H a r$ i
necessary, the oxide layer, for obtaining a sufficient and durable contact pressure0 _* W* u( T% I$ m
and for ensuring that the point of connection withstands the corrosion test specified;
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( |- C( q4 N F) F# Yhowever, until a suitable corrosion test and an electrical performance test are
( J3 M' w( M2 t5 o8 k3 P( Savailable, aluminium and its alloys should preferably not be used for current-carrying. q, g7 n! Z* R' |+ }* i
parts and terminals within the equipment.8 }+ y2 Q' l4 x/ v1 d% z
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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