低压开关设备和控制设备组件 第3部分：供普通人操作的配电板 (DBO)

[中文适用范围]： 本部分 IEC 61439 定义了由普通人员操作的分电盘（本文档中简称 DBO，见 3.1.101）的具体要求，包括： - 由普通人员操作的组件（例如开关操作和更换保险丝），例如在家庭（家用）应用中； - 包含由普通人员操作的带有保护装置的输出电路的组件，符合例如 IEC 60898-1、IEC 61008 系列、IEC 61009 系列、IEC 62606、IEC 62423 和 IEC 60269-3； - 用于对地额定标称电压不超过 300 V AC 的应用的组件（参见 IEC 61439-1:2020 的表 G.1）； 注：直流应用的电压限制正在考虑中。 - 输出电路的额定电流（Inc）不超过 125 A 且额定电流（InA）不超过 250 A 的组件； - 用于与发电、输电、配电和电能转换相关的组件，以及用于控制消耗电能的设备和相关数据处理的组件； - 封闭式固定组件； - 用于室内或室外使用的组件。 DBO 还可以包括与电能分配相关的控制和/或信号装置。 DBO 可以在原制造商的工厂外组装。 DBO 可以包含保护装置、控制装置、信号装置或组合装置，例如断路器、负载脱落继电器、能源管理、通信设备、照明控制。 本文件不适用于空外壳或符合相关产品标准的单个设备和独立组件，例如断路器、熔断开关、电子设备等，它描述了将设备或独立组件或两者集成到 DBO 或形成 DBO 的空外壳中。 本文件适用于一次性设计、制造和验证的 DBO 或完全标准化并批量生产的 DBO。 本文件不适用于 IEC 61439 系列其他部分涵盖的特定类型的组件。 注：家用和类似固定电气安装的电气附件的外壳在 IEC 60670-24 中涵盖。 [外文原描述]： IEC 61439-3:2024 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC 61439-3:2024 edition 2.0 and the previous IEC 61439-3:2012 edition 1.0. Furthermore, comments from IEC TC SC 121 experts are provided to explain the reasons of the most relevant changes, or to clarify any part of the content. IEC 61439-3:2024 defines the specific requirements for distribution boards intended to be operated by ordinary persons (abbreviated DBO throughout this document, see 3.1.101) as follows: - assemblies intended to be operated by ordinary persons (e.g. switching operations and replacing fuse-links), e.g. in domestic (household) applications; - assemblies containing outgoing circuits with protective devices intended to be operated by ordinary persons, complying e.g. with IEC 60898-1, the IEC 61008 series, the IEC 61009 series, IEC 62606, IEC 62423 and IEC 60269-3; - assemblies for applications where the nominal voltage to earth does not exceed 300 V AC (see Table G.1 of IEC 61439-1:2020); NOTE The voltage limits for DC applications are under consideration. - assemblies with a rated current (Inc) of the outgoing circuits not exceeding 125 A and a rated current (InA) not exceeding 250 A; - assemblies intended for use in connection with the generation, transmission, distribution and conversion of electrical energy, and for the control of equipment consuming electrical energy and for associated data processing; - enclosed, stationary assemblies; - assemblies for indoor or outdoor use. This second edition cancels and replaces the first edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) alignment with the structure of IEC 61439-1:2020; b) inclusion in the scope of more examples of the type of protection and control devices; c) deletion of type A and Type B DBOs; d) addition of a new Annex BB related to DBOs used in a prosumer’s electrical installation (PEI); e) addition of a new Annex CC related to rated current of a DBO with additional source of supply in parallel/simultaneously with another source that is connected to the DBO e.g. PV.