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27.4中:
! Y3 T/ t7 [8 s# o# N8 E) A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4 V" G0 @& p+ g8 I5 G% q- M5 L4 b
或铝合金的接触而引起的腐蚀危险。, p* ?! G6 U+ d N. I( O/ K
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。
* v& p$ Q b$ E; {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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在168A决议中有这么一句话:
! o/ X% z' [, Y- Aluminium and its alloys, provided special measures are taken for removing, where
- f4 R0 f, d6 H' {, z0 B) k( f$ Onecessary, the oxide layer, for obtaining a sufficient and durable contact pressure
0 z3 W Z: O4 u+ z2 Land for ensuring that the point of connection withstands the corrosion test specified;
7 l2 R; }7 ]* m; ~% o; [3 T8 P6 w. l: p. Y- w- j. H
however, until a suitable corrosion test and an electrical performance test are
/ \3 G: c. A; h* ravailable, aluminium and its alloys should preferably not be used for current-carrying
- _) t! g% C8 ~% W$ L: ?parts and terminals within the equipment.
; d( ?9 I, E q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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