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27.4中:/ x+ R- Z8 n& N5 E7 { }
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- z) u' I: }' m+ Z7 l$ E
或铝合金的接触而引起的腐蚀危险。
/ C- H& K7 s' m4 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。7 f# p- f8 K( \8 b* @' B: X
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。7 P% j8 a; _" @$ h4 Z1 c
9 i8 h6 A, _8 h0 I( t在168A决议中有这么一句话:
c2 z( H9 h2 a1 ]. [- Aluminium and its alloys, provided special measures are taken for removing, where
4 ]5 m1 \! X7 U) dnecessary, the oxide layer, for obtaining a sufficient and durable contact pressure) S8 N. W9 f* c* n
and for ensuring that the point of connection withstands the corrosion test specified;" H/ ^) I; a& s7 O' I
9 |6 o; _' W: Q6 Y$ `3 Xhowever, until a suitable corrosion test and an electrical performance test are
/ \# j! v: g- I. Lavailable, aluminium and its alloys should preferably not be used for current-carrying" [1 D- V3 d& @+ y7 ]! ]
parts and terminals within the equipment.
) Z B( M/ @- e. b7 p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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