各种SELV定义
本帖最后由 tsunn 于 2013-8-9 20:34 编辑各种不同的定义太累。大家有什么看法。
EN60335版本定义：
3.4.2
safety extra-low voltage
voltage not exceeding 42 V between conductors and between conductors and earth, the no-
load voltage not exceeding 50 V
When safety extra-low voltage is obtained from the supply mains, it is to be through a
safety isolating transformer or a convertor with separate windings, the insulation of which
complies with double insulation or reinforced insulation requirements.
NOTE 1 The voltage limits specified are based on the assumption that the safety isolating transformer is
supplied at its rated voltage.
NOTE 2 Safety extra-low voltage is also known as SELV.
EN60598版本定义：
1.2.42.2
SELV (safety extra low voltage)
ELV in a circuit which is insulated from the mains supply by an insulation not less than that
between the primary and secondary circuits of a safety isolating transformer according to
IEC 61558-2-6 or equivalent
NOTE Maximum voltage lower than 50 V a.c. r.m.s. or 120 V ripple free d.c. may be specified in particular
requirements, especially when direct contact with current-carrying parts is allowed.
我在网上下载了一个不知道哪个机构翻译的UL8750中文版，里面居然有SELV定义,看图（但我在英文版（2009）里没发现该定义。在UL8750里其实叫做LVLE）
各种不透明的水印，坑爹 混亂了，隻記得我們的安全電壓是36伏以下的交流電。 8750里是要求交流不超过42.4 直流不超过60 .CSA是交直流都不超过42.4 标准不一样，定义也不一样， 这个也是很正常的事。 在欧规里面， 灯具跟驱动电压应该算是最高的了！！
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