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配电盘（以下简称DBO，见3.1.101）的具体要求，包括： - 由普通人员操作的组件（如开关操作和更换熔断器），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； - 适用于对地标称电压不超过300 V AC的应用（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。 - 出线电路的额定电流（Im）不超过125 A，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，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、固定式组件； - 用于室内或室外使用的组件。 DBO可以包含保护装置、控制装置、信号装置或其组合，例如断路器、负荷卸载继电器、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（如断路器、熔断开关、电子设备），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。 本文件适用于按一次性设计、制造和验证的DBO或完全标准化和批量制造的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外壳在IEC 60670-24中涵盖。 [外文原描述]： IEC 61439-3:2024 EXV contains both the international standard and its extended version (EXV). This extended version of the official IEC Standard is available in English only and provides the user with a comprehensive content of the Standard. IEC 61439-3:2024 EXV includes the content of the references made to IEC 61439-1:2020. 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.