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27.4中:
- F; a+ e2 e4 ^9 t1 L- x L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
% _+ e3 Y* ?& W$ d% e) r7 Z或铝合金的接触而引起的腐蚀危险。8 F( P$ L% D5 Y5 {+ e
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。' k" E- t0 i" d3 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。: y" K$ v* g) o3 B
) Q" l7 R; R3 X4 _) Z" p
在168A决议中有这么一句话:
) i, C/ C/ ]6 B/ b0 k+ Z- Aluminium and its alloys, provided special measures are taken for removing, where/ f$ o& l; f r6 d( |) N; T- u
necessary, the oxide layer, for obtaining a sufficient and durable contact pressure
' O. i8 I) C4 L' h( A# Wand for ensuring that the point of connection withstands the corrosion test specified;5 p- a# w7 \$ |' e
9 j* o2 T6 z: _) `6 Chowever, until a suitable corrosion test and an electrical performance test are
& J* c+ Z& n% F6 x1 Z5 Havailable, aluminium and its alloys should preferably not be used for current-carrying& f# t7 x! m. z# ?% Z
parts and terminals within the equipment.
. Q7 g+ }) _; x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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