标题: Safety extra low voltage [打印本页] 作者: xshrmm 时间: 2012-1-19 09:47 标题: Safety extra low voltage 请教一个问题：
在IEC60598-1(2008)中，SELV(Safety extra low voltage)定义如下：
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 50V a.c. r.m.s. or 120V ripple free d.c. may be specified in particular requirements, especially when direct contact with current-carrying parts is allowed.