标题: 类似纤维棉的东西可否作为绝缘 [打印本页] 作者: ericlee 时间: 2008-10-30 15:20 标题: 类似纤维棉的东西可否作为绝缘 各位大侠，小弟有个问题想请教下： M7 t0 A4 j: u( ]& X
在家用电器的情况下，假如在带电部件和金属外壳之间用类似纤维棉的东西作为绝缘可以吗？如果不可以，为什么？作者: 大侠风清扬 时间: 2008-10-30 16:18
不可以2 W% Q3 b7 E0 B8 x
有一下几个问题 ) a+ Z- `, E8 t! @" x1. 爬电距离和电气间隙会不满足要求,因为纤维棉上有小孔, |& v' M8 G% {- ?$ }+ _; v0 I
2.耐压会通过不过6 q3 w: ]. M2 F1 m: z2 E$ n8 x/ {
3.潮态试验有做过吗? 2 x9 ?& W, M7 Y2 h4.阻燃试验有做过吗?作者: 花儿 时间: 2008-10-30 16:31
标准clause 22.21 Wood, cotton, silk, ordinary paper and fibrous or hygroscopic material not used as insulation, unless impregnated. This does not apply to magnesium oxide and mineral ceramic fibres used for the electrical insulation of heating elements.$ I1 Z! G( J: f N
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Insulating materal is considered to be impregnated if the interstices between the fibres of the material are substantially filled with a suitable insulant.) F' F0 n, { }3 a