楚人美 发表于 2016-8-31 11:32

吊重后判定

无吊链的吊灯4倍吊重后电线变长1CM。但高压可过。这算明显变形吗？感觉标准没说清。

Nezof 发表于 2016-8-31 11:53

按标准算电线承受的内应力

fasten 发表于 2016-8-31 12:36

标准怎么说？
是1米电线变长1cm还是1cm电线变长1cm？

safty-001 发表于 2016-8-31 15:28

请参考4.14.2 The mass of the luminaire suspended by flexible cables or cords shall not exceed 5 kg.
The total nominal cross-sectional area of the conductors of flexible cables or cords suspending
pendants shall be such that the stress in the conductors does not exceed 15 N/mm2.
For the calculation of the stress, only the conductors are considered.
Where a luminaire of mass greater than 5 kg is intended to be suspended, the design of the
luminaire or of the flexible cable or cord shall be such as to prevent any tension being applied
to the conductors.
NOTE 1 This requirement can be met by using a cable which incorporates suitable load-carrying cores.

原任 发表于 2016-9-1 16:58

我觉得更应该考虑软线固定架试验。

nerve-yyy 发表于 2016-9-2 13:50

电线变长不超过2mm，就OK了吧。

lxie 发表于 2018-2-2 14:42

好像没看到标准答案

237155238 发表于 2020-2-12 17:01

考虑电线应力吧

15919361091 发表于 2020-2-29 08:46

IEC60598-1 4.14.2 描述了，考虑应力就行。
页: [1]
查看完整版本: 吊重后判定