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板（本文档中简称 DBO，见 3.1.101）的具体要求，适用于以下情况： - 由普通人员操作的组件（如开关操作和更换保险丝），例如家庭（家用）应用； - 包含由普通人员操作的带有保护装置的出线电路的组件，符合例如 IEC 60898-1、IEC 61008 系列、IEC 61009 系列、IEC 62606、IEC 62423 和 IEC 60269-3； - 用于对地标称电压不超过 300 V AC 的应用（见 IEC 61439-1:2020 的表 G.1）； - 出线电路的额定电流（Inc）不超过 125 A，且额定电流（InA）不超过 250 A； - 用于与发电、输电、配电和电能转换相关的设备控制及数据处理； - 封闭式、固定式组件； - 用于室内或室外的组件。 DBO 可以包含保护装置、控制装置、信号装置或它们的组合，例如断路器、负载卸载继电器、能源管理、通信设备、照明控制。 本文档不适用于空外壳或单独设备及自包含组件（如断路器、熔断开关、电子设备），这些设备符合相关产品标准。本文档描述了将设备或自包含组件集成到 DBO 或形成 DBO 的空外壳中的过程。 本文档适用于按单件设计、制造和验证或完全标准化并批量生产的 DBO。 本文档不适用于 IEC 61439 系列其他部分涵盖的特定类型组件。 [外文原描述]： 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.