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[问题求助] 探讨交流贴:UL电线绝缘内表面不规则,绝缘厚度如何测量?
P:2011-12-07 11:36:20
1
UL电线绝缘厚度,标准要求分别测量最大值和最小值。
附图为绝缘切面的投影图,绞合导体导致绝缘内表面不规则。
这种情况该如何测量?
附UL2556标准相关章节:
4 Insulation and jacket materials tests
4.1 Thickness
4.1.4.2.1 Averaging method
The minimum and maximum thickness shall be determined using the procedures described in Clause
4.1.4.1.1 or 4.1.4.1.2. For insulation, measurements shall be made within the irregularities resulting from
conductor stranding. For extruded-to-fill jackets, all measurements shall be made within the irregularities
resulting from the conductors. If the pin described in Clause 4.1.4.1.1 does not fit within the irregularities,
this method is not applicable.
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