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楼主 |
发表于 2009-9-8 20:28
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怎么理解下面的意思(UL498-2001比较老了)* f+ M, n; ^3 U* G* V+ n% L
(8 Insulating Materials)
/ N% T. n/ ^& O! q- K9 T, O3 g8.3 Electrical properties(条款里也有对绝缘材料厚度的要求): E$ o( v4 x3 x3 S6 g( L
8.4 Thermal properties
- f9 U6 `( K0 P7 u$ U. \- z8.4.1 A polymeric material used for electrical insulation or enclosure of live parts shall have the relative
$ m2 T: t, ^7 ~thermal index ratings shown in Table 8.2 for the specific application of the insulating material. For6 W7 B- i# M% e' G) M4 t
materials with other than VTM flammability classifications, the material shall be evaluated using the
' j" G. x2 H+ c8 vspecimen thickness employed in the end product or nominal 1/8 inch (3.2 mm) thickness, whichever is
+ E) m* P- V6 I. o5 P6 n0 Cgreater.
& H4 u( H$ H. l以上条款的绝缘材料的厚度要求是否对插头外围尺寸起限制作用.或者只是对材料测试时的一种要求. |
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