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第8.1.4章的目的是判断那些载流部件是live part, 是不可触及的,先给出两个定义, live part 和安全特低电压
+ Z( {$ V' J* b0 jlive part
1 ?0 ]4 A& A% j5 M2 hconductor or conductive part intended to be energized in normal use, including a neutral- M6 A" H5 ^ u6 C7 \: a
conductor but, by convention, not a PEN conductor
; _" e! M3 ^ ENOTE 1 Parts, accessible or not, complying with 8.1.4 are not considered to be live parts.
! ?+ H9 k# S4 j1 j7 Y请注意这里的note 14 m- z- r4 d) W( T8 m$ {. k
# C' h0 H0 ]- H( {; ]' i2 u3 b
safety extra-low voltage5 w$ r3 W9 l z! L l! t
voltage not exceeding 42 V between conductors and between conductors and earth, the noload3 M" _# }; B& t; A9 T$ v0 S
voltage not exceeding 50 V: `* k* ~$ Y1 }" ?( b+ G
When safety extra-low voltage is obtained from the supply mains, it is to be through a
m+ |% f5 _6 E/ ^safety isolating transformer or a convertor with separate windings, the insulation of which8 Y: C7 H4 I1 J. {. ^3 X
complies with double insulation or reinforced insulation requirements.
: Z2 y5 j/ H- H" l0 S# h请注意这里的电压, 对于600335, 凡是没有特别说明的, 电压都是指R.M.S.值, 你比较一下8.1.4中的电压值就可以知道了,并不是所有的安全特低电压都可以触及的.( h( Q; [+ w9 R/ f
3 j) O6 u# m: [0 W p$ O8.1.4中的电压没有说是否带载,那也就是说空载,带载都要考虑的 |
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