绝缘软套管第3部分:各种型号套管规范活页216:热收缩阻燃有限火灾危险套管

[中文适用范围]： 该部分IEC 60684规定了两种用于母线绝缘的热缩聚烯烃套管的要求，其标称收缩比为2,5:1。该套管适用于高达100 °C的温度。类型A：中等壁厚——内径通常达170,0 mm。类型B：厚壁——内径通常达165,0 mm。这些套管通常以红色或棕色提供。由于这些类型的套管覆盖了很大范围的尺寸和壁厚，附录A（表A.1和A.2）提供了可用尺寸范围的指导。实际尺寸和壁厚将根据用户和供应商之间对已安装管子的电强度要求和用户的要求进行协商。符合该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要求，而不仅仅是基于该规范。 [外文原描述]： IEC 60684-3-283:2019 gives the requirements for two types of heat-shrinkable, polyolefin sleeving for bus-bar insulation, with a nominal shrink ratio of 2,5:1. This sleeving has been found suitable up to temperatures of 100 °C. Type A: Medium wall - internal diameter up to 170,0 mm typically Type B: Thick wall - internal diameter up to 165,0 mm typically These sleevings are normally supplied in colour, red or brown. Since these types of sleeving cover a significantly large range of sizes and wall thicknesses, Annex A (Tables A.1 and A.2) provides guidance to the range of sizes available. The actual size and wall thickness will be agreed between the user and supplier depending on the electric strength of the installed tubing offered and the requirements of the user. 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 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 for bus-bar insulation