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27.4中:
9 p1 p* r; U& ]' V. A/ i3 D! f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2 g0 e. Z1 p: C, \0 D
或铝合金的接触而引起的腐蚀危险。- W5 {2 c, N0 a; V x9 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。
( Y" \9 u! y4 [! Y, 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。! D" t8 [" e9 L3 l9 _6 X
5 p- l7 D0 E7 y1 M) ]* l: p d$ S5 j0 H! K在168A决议中有这么一句话:
9 B1 A3 r; L. U) P ^- Aluminium and its alloys, provided special measures are taken for removing, where
# Q; ^' S1 i g5 w3 O Tnecessary, the oxide layer, for obtaining a sufficient and durable contact pressure7 a; p$ {' C/ J
and for ensuring that the point of connection withstands the corrosion test specified;# [% c0 t- ^/ N- \# [
$ p* x+ y# O3 Dhowever, until a suitable corrosion test and an electrical performance test are
# ~) _* v% p* m( Navailable, aluminium and its alloys should preferably not be used for current-carrying
8 S/ n4 ^, O+ a8 b) X9 gparts and terminals within the equipment., `7 Y3 Y- i6 ^3 h0 c, n! I
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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