常见安规问题-集锦

2022-04-22 06:20:09   文档大全网     [ 字体: ] [ 阅读: ]

#文档大全网# 导语】以下是®文档大全网的小编为您整理的《常见安规问题-集锦》,欢迎阅读!
集锦,常见,问题,安规
安规问题集锦:

1、标志不当: a.fuse marking b.power switch symbol c.protective earth symbol d.PE wire color 2.安全说明:

a.Motltipower supply system

b.protective earth connection instruction c.High touch current warning label d.Hazardous voltage 3.绝缘距离:

a.10N force requirement for all parts

b.misunderstand bulk capacitor's insulation specifications c.Ill assembly

d.misunderstand fan wire's insulation feature

e.transformer construction fail: margin tape width and turns of insulation tape 4.资料和元器件:

a.certificate out of validity

b.misuse component certificate: UL and European standards different

c.miss safety critical components in CDF: discharge resistors and bulk capacitor

d.misunderstand the requirements for safety critical components: not all safety critical components need certificate e.misunderstand components 5.安规测试:

a.Hi-pot fail, especially after 48hours' humidity treatment b.Touch current fail

c.Output overload fail: temp. exceeded safety limit

d.Component fault simulation: temp.on transformer and output voltage exceeded safety limit 6.设计更改和生产一致性:

a. Non-conformance between certification and production b. Label format

7.PCB Layout图提供不对,只提供了器件装配图,没有走线图。


Royce_wang@yahoo.com.cn


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