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本帖最后由 leaphile 于 2015-3-4 23:13 编辑 , @6 V( Z. x4 x! ~5 z# G$ Z
canghai 发表于 2015-3-4 18:45 + p: |' _- k6 s) q$ Y2 o9 v
screening 和connect是有区别的吧,屏蔽和连接应该还是有差别的。 9 u- [5 |1 S6 f; U! W' C' n
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protective extra-low voltage circuit# m5 `/ ?2 |, E+ X
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earthed circuit operating at safety extra-low voltage which is separated from other circuits by 0 l: T" {, S) d2 ?
5 i7 x2 ?5 \4 T/ j+ @+ b6 S7 a- basic insulation and protective screening. z4 ~ n: y# c2 J/ ]/ o
- double insulation or ( S3 q- O. t1 g; O9 A$ f! P
- reinforced insulation. r7 m% t* C+ F3 ~2 T. E
" U$ G( p7 c2 l- ?这好像是说PELV电路和其他电路之间的绝缘要求
% ]* t V) [: ]. R- `% X7 x X而不是说PELV 电路不能和earth 连接?
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