电缆电气试验方法 第3部分：挤压电力电缆长度局部放电测量试验方法

[中文适用范围]： IEC 60885-3:2015 RLV 包含官方 IEC 国际标准及其红线版本。 Redline 版本仅提供英文版本，为您提供了一种快速、简单的方法来比较官方 IEC 标准与其先前版本之间的所有更改。 IEC 60885-3:2015 规定了对挤压电力电缆长度进行局部放电 (PD) 测量的测试方法，但不包括对已安装电缆系统进行的测量。参考 IEC 60270，它给出了一般适用于局部放电测量的技术和注意事项。 IEC 60885-3 第二版取消并取代了 1988 年发布的第一版，构成了技术修订版。与前一版本相比，该版本包括以下重大技术变化： - 灵敏度定义为背景噪声水平的两倍已被删除，并由基于可检测放电的最低水平的实际灵敏度评估所取代。 - 示波器上以毫米为单位的脉冲高度测量值已被以 PC 为单位的局部放电强度测量值所取代。 - 条款的顺序已根据 IEC 标准的通用编号方案进行了修订，并提供清晰度以促进其实际使用。第一版（应用指南）的第 3 节已被删除，因为人们认为从参考书目中列出的原始参考文献中可以获得更好的背景信息。 [外文原描述]： IEC 60885-3:2015 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60885-3:2015 specifies the test methods for partial discharge (PD) measurements on lengths of extruded power cable, but does not include measurements made on installed cable systems. Reference is made to IEC 60270 which gives the techniques and considerations applicable to partial discharge measurements in general. This second edition of IEC 60885-3 cancels and replaces the first edition, published in 1988 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - The definition of sensitivity as twice the background noise level has been removed and replaced by a practical assessment of sensitivity based on the minimum level of detectable discharge. - References to measurements of pulse heights in mm on an oscilloscope have been replaced by measurements of partial discharge magnitude in pC. - The order of the clauses has been revised in line with the general numbering scheme of IEC standards and to provide clarity in order to facilitate its practical use. Section 3 of the first edition (Application guide) has been removed as it is considered that background information is better obtained from the original references as listed in the bibliography.