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续上:% X2 g4 T1 L! R' G) O
在IEC60335-1:2006中的第3.36中提出定义:
! j) y: i. C, v' j" r% V. ~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。2 m7 W2 X: q/ n
Clause 8.1.4:An accessible part is not considered to be live if :, e+ E" X# r$ T
-the part is supplied at safety extra-low voltage, provided that7 h- }9 y! A1 E1 c0 J/ l- r
*for a.c., the peak value of the voltage does not exceed 42.4V6 d8 {5 ^- M0 Y A- Q3 h) S
*for d.c., the voltage does not exceed 42.4, or , N) z% {+ }: `8 I6 Q5 e+ O2 O
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。7 b: o6 M+ ?. F" U4 w H
60335-1:clause13.1:在进行试验前断开保护阻抗和无线电干扰滤波器。1 ^5 w Z+ `' l$ g
60335-1:clause16.1:在进行试验前,保护阻抗要从带电部件上断开。9 I5 ~: \2 N1 J, n- g
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。/ c0 V" F+ z- Q$ }$ b
60335-1: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。& ^5 q3 v+ t6 H0 ~# l: p4 l
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。2 H$ T. ?$ T7 w5 J: ?# W
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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