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willing 发表于 2012-6-26 11:05 
% k3 m( ?9 {, d1 b1 y$ b, I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 ...
- @; A3 V* o& GSELV定义下面还有一段话的,没有绝缘要求把这个S要往哪放。。。
" h, A" T9 H$ d' g7 F* f( ~" xSELV和ELV的区别也不止这点,或者说不是这么理解。。
, w7 K# ?) ?+ wWhen safety extra-low voltage is obtained from the supply mains, it is to be through a: s' w2 A0 `( P' e: @& K# O0 H S: `
safety isolating transformer or a convertor with separate windings, the insulation of which! x0 e: D: O/ `8 ] z
complies with double insulation or reinforced insulation requirements.
% X, t$ Z. K6 `$ qELV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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