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27.4中:
6 j" W. r8 p0 M: F( |8 p3 N" ~1 h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 U$ l/ i; p& S) p
或铝合金的接触而引起的腐蚀危险。
1 v. Y. o$ n- d, J( d7 J5 {8 V+ 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。
: G$ t5 M. u# w3 H& O# C6 ?! n2 H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。+ V" r" E* _* _5 I( _( c
$ ] m# Q8 w+ [7 U在168A决议中有这么一句话:
2 k5 ?8 X. X4 P& `$ Q; K0 ]- Aluminium and its alloys, provided special measures are taken for removing, where
6 K c, I% p7 w, S Rnecessary, the oxide layer, for obtaining a sufficient and durable contact pressure3 T+ f: y; T8 }( K
and for ensuring that the point of connection withstands the corrosion test specified;
( d( J1 ?) \& r; J9 b# ^$ n1 Q4 b- w+ y# ~
however, until a suitable corrosion test and an electrical performance test are
, r5 t+ j7 L7 R9 _available, aluminium and its alloys should preferably not be used for current-carrying
& R; n% x2 l; I9 s ~" E' }parts and terminals within the equipment.
P' ?) p) O% d/ @+ v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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