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本帖最后由 leaphile 于 2015-3-4 23:13 编辑
5 t; {6 G8 n, h ^4 i$ p" P1 ecanghai 发表于 2015-3-4 18:45 
5 J' ~1 @' v" \/ {& C5 Iscreening 和connect是有区别的吧,屏蔽和连接应该还是有差别的。
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6 A: H1 ~; l4 |( z0 ]9 Q) e; Pprotective extra-low voltage circuit* g% F- `& Y6 |4 @# r
" n) W& Z3 s4 Y% U' q; m1 @7 uearthed circuit operating at safety extra-low voltage which is separated from other circuits by
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: t( [$ f0 M3 b h- basic insulation and protective screening" h2 p* |, |# H. ?# `- e
- double insulation or , l, M! B/ v6 b8 q* n8 P: f4 M0 O
- reinforced insulation
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& C- _: f3 ?% D1 ^这好像是说PELV电路和其他电路之间的绝缘要求: c. x* F7 u s5 o# D2 X
而不是说PELV 电路不能和earth 连接?
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