电缆.带特殊保护功能挤出外套的试验

[中文适用范围]： 本国际标准提供了对具有挤压外护套且外护套具有特殊保护功能的电缆可能需要的一系列测试。注 1：对特殊功能的需求可能与绝缘类型的性质无关，也与电缆的额定电压无关。该标准涵盖用于绝缘系统和非绝缘系统的电缆。测试分为 a) 常规测试、b) 型式测试、c) 安装后测试。这些测试包括： - 对绝缘或非绝缘系统中使用的电缆外护套进行电气常规测试， - 磨损和腐蚀扩散类型测试， - 安装后对电缆外护套进行电气测试。相关电缆标准中规定的例行测试和安装后测试适用于所有情况。型式测试取决于系统的性质和电缆的结构，并且不必在正常使用条件下进行。磨损测试的应用在附录 A 中给出。 注 2：安装后测试的指导在附录 B 中给出。 [外文原描述]： Provides a range of tests which may be required for electric cables which have an extruded oversheath and where that oversheath performs a special protective function. The standard covers cables for use in insulated systems and in uninsulated systems. The tests are categorized for use as routine tests, type tests and tests after installation. These tests comprise of electrical routine tests on cable oversheath used in insulated or uninsulated systems, abrasion and corrosion spread type tests, electrical test on cable oversheath after installation. Routine tests and tests after installation, as specified in the relevant cable standards, are applicable for all situations. Type tests depend upon the nature of the system and the construction of the cable and do not have to be carried out for normal conditions of use. The significant technical changes with respect to the previous edition are as follows: - The text has been modified in order to consider the function of the oversheath, irrespective of the way the metallic sheath or screen of the cable is earthed because, in some cases, the oversheath is designed to act not only as a protection against corrosion, but also to reduce the risk of degradation of the cable insulation system. This requirement may be independent of the nature of the insulation and independent of the rated voltage of the cable. - More precise wording has been introduced regarding the application of some tests (if the sheaths or foils are bonded to the oversheath or not). - The test requirements have been revised in order to be in line with the standards published after the second edition. - The pressure test at high temperature has been deleted as the requirement is specified in the relevant cable standards. - A "Guidance on tests after installation" (Annex B) has been included.