柔性绝缘套管 - 第3部分:各种套管规格 - 板材280:热收缩聚烯烃套管

[中文适用范围]： 本部分 IEC 60684 规定了额定收缩比为 3:1 的防跟踪、热缩、聚烯烃绝缘套管的requirements。该套管适用于最高100°C的温度。通常为中等壁厚，内径高达110 mm。该套管通常供应红色或棕色。由于此类套管覆盖的尺寸和壁厚范围相当大，附件A（表A.1）提供了可用尺寸范围的指导。实际尺寸将在用户和供应商之间商定。符合此规范的材料满足既定的性能水平。然而，用户为特定应用选择材料将基于该应用所需的实际性能要求，而不仅基于此规范。该套管设计用于中压电缆附件，因此其电气性能将作为组装的一部分进行验证。HD 629.1 和 IEC 60502（所有部分）中描述了此类示例。 [外文原描述]： IEC 69684-3-280:2019 gives the requirements for heat-shrinkable, polyolefin sleeving, anti-tracking with a nominal shrink ratio of 3:1. This sleeving has been found suitable for use at temperatures up to 100 °C. Typically: medium wall, internal diameter up to 110 mm. This sleeving is normally supplied in the colours red or brown. Since these types of sleeving cover a significantly large range of sizes and wall thicknesses, Annex A (Table A.1) provides guidance on the range of sizes available. The actual size will be agreed between the user and the supplier. Materials which conform to this specification meet established levels of performance. However, the selection of a material by a user for a specific application will be based on the actual requirements necessary for adequate performance in that application and not based on this specification alone. This sleeving is designed to be used in medium voltage cable accessories and as such electrical performance willbe proven as part of the assembly. Examples of this are described in HD 629.1 and IEC 60502 (all parts). This second edition cancels and replaces the first edition published in 2010 and Amendment 1:2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - change of moulded plaque thickness for resistance to tracking and weathering tests to (6 ± 0,5) mm. Keywords: Heat-shrinkable, polyolefin sleeving, anti-tracking