标题: 吊重后判定 [打印本页] 作者: 楚人美 时间: 2016-8-31 11:32 标题: 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。作者: Nezof 时间: 2016-8-31 11:53
按标准算电线承受的内应力作者: fasten 时间: 2016-8-31 12:36
标准怎么说？* b! ]+ n. C1 E1 R7 @ y( Z: J
是1米电线变长1cm还是1cm电线变长1cm？作者: safty-001 时间: 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.0 I$ S. r$ b2 z! i+ B: }. g
The total nominal cross-sectional area of the conductors of flexible cables or cords suspending * A6 i2 n7 O. `) P2 Q3 A) U0 @pendants shall be such that the stress in the conductors does not exceed 15 N/mm2. . {/ B1 a6 D' r- L+ Q# |: bFor the calculation of the stress, only the conductors are considered.2 u% e# {0 D$ M: M# i* A
Where a luminaire of mass greater than 5 kg is intended to be suspended, the design of the* R! L: P. s6 i) B1 Z2 F1 P
luminaire or of the flexible cable or cord shall be such as to prevent any tension being applied; x0 o- p) c$ A/ o
to the conductors.- U1 K3 q% s `' H( h
NOTE 1 This requirement can be met by using a cable which incorporates suitable load-carrying cores.作者: 原任 时间: 2016-9-1 16:58
我觉得更应该考虑软线固定架试验。作者: nerve-yyy 时间: 2016-9-2 13:50
电线变长不超过2mm，就OK了吧。作者: lxie 时间: 2018-2-2 14:42
好像没看到标准答案作者: 237155238 时间: 2020-2-12 17:01
考虑电线应力吧作者: 15919361091 时间: 2020-2-29 08:46
IEC60598-1 4.14.2 描述了，考虑应力就行。