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本帖最后由 tsunn 于 2013-3-6 11:49 编辑 + y& u0 Z8 c1 O ^
tsunn 发表于 2013-3-6 08:41 4 j: R- I5 d; k0 O, s
就算能确定外面这层漆能过潮态后的电气强度要求,也不能当成附加绝缘来使用。作为金属罩壳涂层的均不可 ... + ~/ G1 B @! ^, k, n+ e! ~. K
R/ R% K) j4 V, [8 {/ J' N不用说什么标准狂人,其实安全规范很多都是相通的,附加绝缘一定要牢靠固定,有国际标准提到涂层不当成牢靠固定方式,可以作为引用。你如果一定要看标准条款,可以参考60598第四章节4.10描述关于附加绝缘要求条款时的NOTE: Lining metal enclosures with a coating of lacquer or with any other material in the form of a coating which can be easily removed by scraping is not considered to meet this requirement. A sleeve is considered to be fixed by positive means if it can only be removed by breaking or cutting or if it is clamped at both ends or its movement on internal wiring is restricted by neighbouring components.不要告诉我在别的标准,涂层又变成可靠的了,虽然有些小标准没有提到,但我们应该清楚外部涂层是不可靠的固定方式。要说标准狂人,我觉得你才是,小标准没说就不用遵行了? |
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