高压开关设备和控制设备 第307部分：AC金属封闭和固体绝缘封装式开关设备及控制设备型式试验有效期延长指南 额定电压超过1 kV且不超过并包括52 kV

[中文适用范围]： 本技术报告是IEC 62271的一部分，适用于额定电压高于1 kV且不超过52 kV的预组装金属封闭和固体绝缘封闭（以下统称为封闭式）交流开关设备和控制设备组件，如IEC 62271-200和IEC 62271-201所规定，以及与这些设备共处同一封闭空间内可能相互影响的其他设备。 本文件可用于将在一组特定额定值下对一个测试对象进行的型式试验的有效性扩展到同一系列中具有不同额定值、不同组件排列或不同绝缘流体的其他开关设备和控制设备组件。它支持选择由开关设备和控制设备系列功能单元组成的代表性测试对象，旨在优化型式试验，以进行一致的符合性评估。 有效性扩展（如型式试验的情况）不包括老化、材料兼容性、对人体健康的毒性或环境影响等方面。制造商和用户有责任检查这些方面是否涵盖在组件设计的技术验证中。 根据组件标准进行的型式试验有效性扩展不在本文件范围内。 本文件结合了可靠的技术和物理原理、制造商和用户经验以及计算，为型式试验的有效性扩展提供指导，涵盖各种设计和额定值方面。 [外文原描述]： IEC TR 62271-307:2024 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 TR 62271-307:2024 refers to prefabricated metal-enclosed and solid-insulation enclosed (both hereinafter called enclosed) switchgear and controlgear assemblies for alternating current of rated voltages above 1 kV and up to and including 52 kV as specified in IEC 62271‑200 and IEC 62271‑201, and to other equipment included in the same enclosure with any possible mutual influence. This second edition cancels and replaces the first edition published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) Structure of document updated. b) Updated references to IEC 62271-200:2021 and IEC 62271-1:2017. c) Addition of criteria for the extension of validity of type tests from functional unit(s) with a different insulating gas to the functional unit to be validated. d) Figure 5 for the validation of a design modification was added. e) Clause B.7 for the extension of validity of type test for a GIS with insulation gas A to insulation gas B was added.