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willing 发表于 2012-6-26 11:05  $ K+ I! F( Q* C; O
我认为单SELV的电路本身是没有绝缘要求的, 因为SELV已明确规定其供应电压小于42V, 且根据8.1.4, SELV供电的 ...
8 }' [& H( x; x' X8 }! L2 `$ R2 n3 nSELV定义下面还有一段话的，没有绝缘要求把这个S要往哪放。。。- {; C' e9 a* i: a) p5 r
SELV和ELV的区别也不止这点，或者说不是这么理解。。& X6 ?& e) |' r ?: s8 \1 s
When safety extra-low voltage is obtained from the supply mains, it is to be through a
% Y' F: i* w0 [' R: s, Osafety isolating transformer or a convertor with separate windings, the insulation of which
2 G( v. t% z$ _) gcomplies with double insulation or reinforced insulation requirements./ z* t% I- A0 @2 L9 G9 A" b
ELV是没有绝缘要求的，只要电压不超过50V，SEVL一定要双重或加强绝缘 |
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