家用和类似固定电气安装的电气附件的箱柜和外壳 第24部分：容纳保护装置和其他功率消耗电气设备的箱柜的特殊要求

[中文适用范围]： 本部分IEC 60670适用于额定电压不超过400V且总输入负载电流不超过125A的家庭和类似固定电气安装中使用的用于容纳保护装置和其他耗电电气设备的外壳及其部件。这些外壳适用于非专业人员可接触的场所安装，由专业人员（安装人员）配备电气设备。这些外壳适用于预期短路电流不超过10kA的场所安装，除非它们受到截止电流不超过17kA的限流保护装置保护。符合本文件的外壳适用于环境温度通常不超过40°C的场所使用，但24小时内的平均温度不超过35°C，环境空气温度下限为-5°C。作为电气附件组成部分并提供对外部影响（如机械冲击、固体物体或水的侵入）保护的外壳，由相关附件标准涵盖。本文件不适用于IEC 60439系列或IEC 61439系列中定义的低压开关设备和控制设备组件，也不适用于可以成为配电板一部分的主入口面板。本文件不适用于适用于家庭和类似用途的开关、电子开关、插座等附件的外壳的表面型盒子、嵌入式或半嵌入式盒子，这些仅由IEC 60670-1涵盖。 [外文原描述]： IEC 60670-24:2024 applies to enclosures and parts of them for housing protective devices and other power dissipating electrical equipment intended to be used with a rated voltage not exceeding 400 V and a total incoming load current not exceeding 125 A for household and similar fixed electrical installations. These enclosures are intended to be installed in locations where unskilled persons have access. They are intended to be equipped with electrical equipment by skilled persons (installers). These enclosures are intended to be installed where the prospective short circuit current does not exceed 10 kA unless they are protected by current limiting protective devices with a cut-off current not exceeding 17 kA. Enclosures complying with this document are suitable for use at ambient temperature not normally exceeding 40 °C, but their average temperature over a period of 24 h does not exceed 35 °C, with a lower limit of the ambient air temperature of −5 °C. This third edition cancels and replaces the second edition published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) revision of requirements for protection against electric shock in Clause 10; b) addition of requirements for functional earthing in 11.101; c) revision of the requirements for fixing of flush type and semi-flush type enclosures in 12.12; d) revision of the requirements for resistance of insulating material to abnormal heat and to fire in Clause 18; e) addition of calculations to take into account the power loss of electronic devices in Clause AA.6; f) addition of tests and requirements for enclosures exposed to direct sunlight with the related Annex CC; g) addition of tests and requirements for enclosures with separate area to accommodate multimedia-equipment with the related Annex DD; h) addition of tests and requirements for enclosures used with connected devices or equipment with the related Annex EE.