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27.4中:. b4 c6 [6 F% i7 E
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
( C7 |. G6 o. L; X/ G" ~6 Y4 {3 D4 @或铝合金的接触而引起的腐蚀危险。
/ q8 m9 ~1 i0 k! F+ A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- r( G' |8 p" R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。
# n( _2 Z- k7 b# j6 K& k" X
$ C; j2 r( M# C0 y5 l, x在168A决议中有这么一句话:
& f0 H0 B* \8 g$ ]8 [$ J- \6 s- Aluminium and its alloys, provided special measures are taken for removing, where
$ D- X' I# ?: S+ z2 ?4 T5 [necessary, the oxide layer, for obtaining a sufficient and durable contact pressure
4 m2 V' N" i/ l4 f/ Sand for ensuring that the point of connection withstands the corrosion test specified;2 \4 U5 T& w+ C6 D
; C0 n* `3 Q" t# n' N5 n5 Uhowever, until a suitable corrosion test and an electrical performance test are" f: z; O3 T% B9 o1 z& ~% @
available, aluminium and its alloys should preferably not be used for current-carrying- Y, J) a8 d) [6 G4 R
parts and terminals within the equipment.
5 s3 t0 p2 f: z6 P" B$ |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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