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续上:
3 p* X1 |9 ]' q# Y( R5 ^" @在IEC60335-1:2006中的第3.36中提出定义:" I$ @# k6 N# r4 g
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。" ~4 D! m7 ^2 v' p
Clause 8.1.4:An accessible part is not considered to be live if :
& I' H& u& j/ S s- l-the part is supplied at safety extra-low voltage, provided that% Q5 R5 w5 L# R) r# X, C
*for a.c., the peak value of the voltage does not exceed 42.4V
( h6 [; I. M2 T r; H2 k9 ?3 F*for d.c., the voltage does not exceed 42.4, or
U6 S7 N% ] H- m7 c* p" lthe 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。) `" ` y' o i6 S+ W% @$ o6 r
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。0 n7 h; ?3 j: t. ]- V* O4 a; F: V
60335-1:clause16.1:在进行试验前,保护阻抗要从带电部件上断开。3 c4 l6 V& C) v& ]1 z
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。5 e3 o( i6 l* N/ |& `- y
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。
% n2 x+ \; {1 w% A* h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。
$ V I. `7 s/ i* a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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