低压供电系统内设备的绝缘配合第1部分:原理、要求和试验

[中文适用范围]： 本部分 IEC 60664 处理额定电压高达交流 1 000 V 或直流 1 500 V 并连接到低压供电系统的设备的绝缘配合。本文件适用于频率高达 30 kHz 的情况。注 1：额定频率高于 30 kHz 的低压供电系统内设备的绝缘配合要求在 IEC 60664-4 中给出。注 2：设备内部电路中可能存在更高电压。它适用于海拔 2 000 m 及以下使用的设备，并为在更高海拔使用的设备提供指导（见 5.2.3.4）。它为技术委员会提供确定间距、爬电距离和固体绝缘标准的技术要求。它包括与绝缘配合有关的电气测试方法。本文件中规定的最小间距不适用于存在电离气体的情况。对于此类情况，可由相关技术委员会酌情规定特殊要求。本文件不处理以下距离：通过液体绝缘的距离；通过空气以外气体的距离；通过压缩空气的距离。本基本安全出版物侧重于安全基本技术要求，主要供技术委员会在根据 IEC 导则 104 和 ISO/IEC 导则 51 确定的原则编制标准时使用。技术委员会的责任之一是在适用的情况下，在编制出版物时利用基本安全出版物。但是，如果相关产品的标准中缺少规定的间距、爬电距离和固体绝缘要求，甚至缺少相关标准，则本文件适用。 [外文原描述]： IEC 60664-1:2020 deals with insulation coordination for equipment having a rated voltage up to AC 1 000 V or DC 1 500 V connected to low-voltage supply systems. This document applies to frequencies up to 30 kHz. It applies to equipment for use up to 2 000 m above sea level and provides guidance for use at higher altitudes. It provides requirements for technical committees to determine clearances, creepage distances and criteria for solid insulation. It includes methods of electrical testing with respect to insulation coordination. The minimum clearances specified in this document do not apply where ionized gases are present. Special requirements for such situations can be specified at the discretion of the relevant technical committee. This document does not deal with distances: – through liquid insulation; – through gases other than air; – through compressed air. This edition includes the following significant technical changes with respect to the previous edition: - update of the Scope, Clauses 2 and 3, - addition of 1 500 V DC into tables, - new structure for Clauses 4 and 5, - addition of Annex G with a flowchart for clearances, - addition of Annex H with a flowchart for creepage distances, - update of distances altitude correction in a new Table F.10. It has the status of a basic safety publication in accordance with IEC Guide 104. The contents of the corrigendum of October 2020 have been included in this copy.