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续上:
% {7 Q" k' F: C. q+ z在IEC60335-1:2006中的第3.36中提出定义:" }! l( c3 F$ o8 j5 \
Protective impedance: Connected between live parts and accessible conductive parts of Class2 constructions so that the current, in normal use and under likely fault conditions in the appliance, is limited to a safe value.连接在带电部件和2类结构的易触及导电部件之间的阻抗,在正常使用中及器具出现可能的故障状态时,它将电流限制在一个安全值。" N7 _$ T1 Z- v( S7 G# n7 X
Clause 8.1.4:An accessible part is not considered to be live if :6 e* k+ K$ y1 J" `4 K& ^" B; R! H
-the part is supplied at safety extra-low voltage, provided that! |3 a$ o5 P& T& _7 ?/ `4 _% h
*for a.c., the peak value of the voltage does not exceed 42.4V
& y6 ]6 O' {+ w' q- J*for d.c., the voltage does not exceed 42.4, or 1 v. A1 {+ \- D
the part is separated from live parts by protective impedance.以下是如有保护阻抗的情况下,它的电流限值,有时间自已去看看此条款。
6 U9 I$ G" w- I9 C60335-1:clause13.1:在进行试验前断开保护阻抗和无线电干扰滤波器。' X7 b1 }! G6 y- h# `: {
60335-1:clause16.1:在进行试验前,保护阻抗要从带电部件上断开。: `. t* A1 n# v5 u# X
60335-1:clause19.11:任何流过保护阻抗的电流都不应超过规定的限值。
7 R/ o0 h5 ]! N- F$ T: p0 S/ S( f60335-1:clause22.27:应采用双重绝缘或加强绝缘将由保护阻抗连接的各个部件隔开。
) @ f Y$ J8 w5 u" j在IEC60384-14:保护阻抗应至少由两个单独的元件组成,这些元件在阻抗在器具的寿命期间内不可能有明显的改变。
, i9 n) T1 ]& t; ~. J S9 C6 @通过上面标准的引用,相信大家心里应该有答案了吧。 |
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