xqaql 发表于 2017-1-11 16:23

接地连续性

本帖最后由 xqaql 于 2017-1-11 16:24 编辑

如图；右边的光源模组靠左右各一片弹片提供接地连续性（接地电阻合格），这种结构符合要求么（可靠的连接）？


fasten 发表于 2017-1-11 16:49

显然不行：

7.2.4 Earthing terminals shall comply with the requirements of 4.7.3. The connection shall be
adequately locked against accidental loosening.
For screw terminals, it shall not be possible to loosen the clamping means by hand.
For screwless terminals, it shall not be possible to loosen the clamping means unintentionally.
Compliance is checked by inspection, by manual test and by the tests specified in 4.7.3.
NOTE In general, the designs commonly used for current-carrying terminals provide sufficient resilience to comply
with this requirement; for other designs, special provisions, such as the use of an adequately resilient part which is
not likely to be removed inadvertently, may be necessary.
For terminal blocks with integrated screwless earthing contacts, the additional tests of Annex V
apply.

martin_cheng 发表于 2017-1-11 16:56

好刁钻的例子，我也想看看大虾们的意见。

Nezof 发表于 2017-1-11 17:15

弹片只是一个临时就位作用，旁边还得有螺丝固定连接来保持连续的可靠性

lucyyff 发表于 2017-1-11 17:17

可以参考下决议DSH 892

305634483 发表于 2017-1-12 09:57

要考虑到可靠性啊,肯定不行

88169103 发表于 2017-1-14 15:44

这种接地肯定是不行的，不可靠

jhet1888 发表于 2017-1-19 08:39

接地是要完全固定，如更换零件时，接地也不可失效。

bub02 发表于 2017-3-4 13:11

肯定不符合要求，随时存在变形

wanaut 发表于 2017-3-5 10:18

可靠固定连接、防锈防腐蚀、连接电阻，几个要求缺一不可
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