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本帖最后由 leaphile 于 2015-3-4 23:13 编辑
; V& J |5 D5 n6 [, E5 dcanghai 发表于 2015-3-4 18:45 
+ ?7 [3 |7 h0 o' jscreening 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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protective extra-low voltage circuit6 k0 s5 d+ x% Q9 W B4 M+ a
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earthed circuit operating at safety extra-low voltage which is separated from other circuits by
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P7 }/ u0 c+ B9 ^- basic insulation and protective screening
7 |; B: s4 K* u/ J+ f- double insulation or 4 ^4 L$ P; A3 h, [
- reinforced insulation8 g5 ~% _* J: a( o' w% U
: D3 s* P$ Y% e' I9 K3 [- L2 Q这好像是说PELV电路和其他电路之间的绝缘要求
% Y+ _- a* B0 @& H; {而不是说PELV 电路不能和earth 连接?
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