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发表于 2018-5-21 10:54
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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),
+ o8 t) i" ]) H2 sI 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8 w4 V9 O) H* B+ z! \
Controlgear with an integrated SPD requiring connection to earth shall be marked with the- R5 F+ {1 n q. e8 c( V3 |7 G' r: U7 C
protective earth symbol according to IEC 60417-5019: 2006-08.# i5 X1 p6 V% p0 t& W- {- v
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60598-1 中class II 中的定义 Note,也说这情况是存在的
/ h. G( e7 v. qNote 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
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