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) L. R3 `9 |% Q1 a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),
' a* ^1 a3 ? I( H# ]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( z6 n8 X1 F$ W7 t
Controlgear with an integrated SPD requiring connection to earth shall be marked with the
% |4 Z; u. v* n: |protective earth symbol according to IEC 60417-5019: 2006-08.
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, S4 X% J. X8 L9 F7 z" I. a60598-1 中class II 中的定义 Note,也说这情况是存在的% T' Y4 i/ t- w; I, R6 B
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 construction7 H8 y# ~; N6 S s
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