绝缘配合.第11部分:HVDC系统的定义、原则和规则

[中文适用范围]： IEC 60071-1第1部分适用于最高电压为设备1 kV以上的三相交流系统。它规定了选择设备相地、相间和纵向绝缘的额定耐受电压的程序，并提供了从中选择额定耐受电压的标准耐受电压列表。本文档描述所选耐受电压与设备最高电压的关联，该关联仅用于绝缘配合目的。本文档不涵盖人类安全的要求。尽管本文档的原则也适用于输电线路绝缘，但其耐受电压值可能不同于标准额定耐受电压。设备委员会负责在考虑本文档建议的情况下，规定适用于相关设备的额定耐受电压和试验程序。 [外文原描述]： IEC 60071-1:2019 applies to three-phase AC systems having a highest voltage for equipment above 1 kV. It specifies the procedure for the selection of the rated withstand voltages for the phase-to-earth, phase-to-phase and longitudinal insulation of the equipment and the installations of these systems. It also gives the lists of the standard withstand voltages from which the rated withstand voltages are selected. This document describes that the selected withstand voltages are associated with the highest voltage for equipment. This association is for insulation co-ordination purposes only. The requirements for human safety are not covered by this document. Although the principles of this document also apply to transmission line insulation, the values of their withstand voltages can be different from the standard rated withstand voltages. The apparatus committees are responsible for specifying the rated withstand voltages and the test procedures suitable for the relevant equipment taking into consideration the recommendations of this document. NOTE In IEC 60071-2, all rules for insulation co‑ordination given in this document are justified in detail, in particular the association of the standard rated withstand voltages with the highest voltage for equipment. When more than one set of standard rated withstand voltages is associated with the same highest voltage for equipment, guidance is provided for the selection of the most suitable set. The main changes from the previous edition are as follows: - all references are updated to current IEC standards, and the bibliography is deleted; - some definitions are clarified in order to avoid overlapping and ensure clear understanding; - letter symbols are changed and corrected in order to keep the consistency with relevant IEC standards; - some titles are changed to clarify understanding (see Clauses A.2, A.3 and Annex B). It has the status of a horizontal standard in accordance with IEC Guide 108 .