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这个问题不用想复杂了。简单来看,对于60335,可以碰到的部件要么是,1. I类器具的基本绝缘+保护接地;2. II类结构中的双重绝缘/加强绝缘;3. SELV和PELV。6 l; z x" H# d/ B& R$ a6 _
看PELV的定义,实际上也是回到了1和2的条件。" @. y* _) P5 \
protective extra-low voltage circuit
; C! I) n M1 u: Y8 F- Rearthed circuit operating at safety extra-low voltage which is separated from other circuits + D% g4 W" b! v5 i4 t
by basic insulation and protective screening, double insulation or reinforced insulation1 h' _- V9 Z' B! }6 ?. @+ f
; }* a _2 q0 n, h {4 _8 u# s( U3 lby basic insulation and protective screening——基本绝缘+保护性接地
0 J9 U3 g, a2 p( h* ?: |9 ~$ Eby double insulation or reinforced insulation——双重绝缘/加强绝缘: Q6 S6 c7 L( s2 i3 t, Z8 p
//Protective screening is the separation of circuits from live parts by means of an earthed screen.//
! q+ i6 j, h- J' r* C所以,这里看结构时,还是回到最基本的要求,看每个次级输出电路(传感器...)和初级电路之间是否满足上面的要求即可。5 ]/ G2 Q7 K5 T, |+ d
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