|

楼主 |
发表于 2018-5-21 10:54
|
显示全部楼层
5 M) U" j$ }: j$ p& U# L! `: i1 R首先确定, I 类灯具 和 I类结构是不同概念,一类灯具是要把metal enclosure 接到 保护接地terminals 上(定义), ( P9 a% f- D. J
I 类 结构说个例子,驱动,全部是塑料外壳,有保护接地terminal 接到SPD,没有接到塑料外壳上,这种情况是可能的4 P/ J0 v2 l+ M. p# D
Controlgear with an integrated SPD requiring connection to earth shall be marked with the6 I" a1 ]+ K# m* b' B7 c
protective earth symbol according to IEC 60417-5019: 2006-08.
6 `5 { B( T: o; g) a2 b+ E4 ~5 y" a- J j$ f: ?
60598-1 中class II 中的定义 Note,也说这情况是存在的+ N0 f& Z4 \ u6 m% h3 }* n. u1 o
Note 4 to entry: If a luminaire with double insulation and/or reinforced insulation throughout has a protective earthing terminal or a protective earthing contact, it is class I construction
3 }1 @- @3 E" @6 W, ?* n! l$ O, `0 ]
$ q5 O0 ?- P* h, `' }
|
|