|
本帖最后由 leaphile 于 2015-3-4 23:13 编辑 ( G: Q5 `& c$ A4 v8 v( o! k
canghai 发表于 2015-3-4 18:45 / H) x% t! \, r( t6 f2 p8 F% f9 c$ H
screening 和connect是有区别的吧,屏蔽和连接应该还是有差别的。
6 C3 y+ {% m$ Q0 |5 W4 Q3.4.4% i" z( f* [, Z0 c
% Y) y1 ]$ g v% X- J% F; J2 l1 Jprotective extra-low voltage circuit9 H6 E; @7 S+ @
9 G" u# H* x0 ]earthed circuit operating at safety extra-low voltage which is separated from other circuits by
2 ~9 F) F: `9 k @9 {" A" J
; q! O; U6 h" t* s- basic insulation and protective screening7 r. G: W) E& z+ W( z
- double insulation or
6 E7 N8 f6 F6 E) J- reinforced insulation
6 ]* X% X3 d) G! n, W5 K- D
* O7 n4 {9 d1 `" h' e2 ~3 n8 |1 Q这好像是说PELV电路和其他电路之间的绝缘要求
' f6 C2 m9 ]" n: U' k8 p而不是说PELV 电路不能和earth 连接?
8 o f( Y( O) ]+ H/ t: X C) z+ I3 j& }! S! W
|
|