绝缘配合.第2部分:应用指南

[中文适用范围]： 本部分IEC 60071构成应用指南，涉及三相交流电气系统设备或装置的绝缘水平选择。其目的是为确定IEC 60071-1范围I和II的额定耐受电压提供指导，并证明这些额定值与设备标准化最高电压的关联性。 此关联仅用于绝缘协调目的。本文件不涵盖人身安全要求。 本文件涵盖标称电压高于1 kV的三相交流系统。此处得出或提出的数值通常仅适用于此类系统。然而，所提出的概念也适用于两相或单相系统。 本文件涵盖相-地、相-相和纵向绝缘。 本文件无意处理例行测试。这些应由相关产品委员会规定。 本文件内容严格遵循IEC 60071-1:2006/2019图1所示的绝缘协调流程。第5至8条对应于该流程图中的方框，并提供了导致建立所需耐受水平的绝缘协调过程概念详细信息。 本文件强调必须从一开始就考虑服务中的所有来源、所有类别和所有类型的电压应力，而不考虑设备的最高电压范围。只有在过程结束时，当选择标准耐受电压时，才适用通过标准耐受电压覆盖特定服务电压应力的原则。此外，在最后一步，本文件参考了IEC 60071-1中标准绝缘水平与设备最高电压之间的相关性。 附录包含解释或支持正文所述概念以及所使用的基本分析技术的示例和详细信息。 根据IEC指南108，它具有横向标准的地位。 [外文原描述]： IEC 60071-2:2023 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 60071-2:2023 constitutes application guidelines and deals with the selection of insulation levels of equipment or installations for three-phase AC systems. Its aim is to give guidance for the determination of the rated withstand voltages for ranges I and II of IEC 60071‑1 and to justify the association of these rated values with the standardized highest voltages for equipment. This association is for insulation co-ordination purposes only. The requirements for human safety are not covered by this document. This document covers three-phase AC systems with nominal voltages above 1 kV, phase-to-earth, phase-to-phase and longitudinal insulation. It has the status of a horizontal standard in accordance with IEC Guide 108. This edition includes the following significant technical changes with respect to the previous edition: a) Clause 4 Concepts governing the insulation co-ordination has been added. b) Subclause 5.3 has been revised, and Subclause 5.4 Detailed simulation has been added because it is widely applied in the recent practices of insulation coordination. c) Special considerations for cable line and GIL/GIB have been added in Clause 9. d) Annex K (informative) Application of line shunt reactor to limitation of TOV and SFO in high voltage overhead transmission lines has been added. e) Annex L (informative) Calculation of lightning stroke rate and lightning outage rate has been added.