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发表于 2018-5-21 10:54
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" @* v- i/ |, g4 V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),
: K5 p' h( V6 F7 H# p* j& RI 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
7 E: v3 ]/ Y, @& c' tControlgear with an integrated SPD requiring connection to earth shall be marked with the
8 i! p) F* a- K) cprotective earth symbol according to IEC 60417-5019: 2006-08.
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60598-1 中class II 中的定义 Note,也说这情况是存在的
" ]# s4 O/ k5 w! I# I: A2 C! ZNote 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& s" V1 W1 H( z) f+ J
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