低压成套开关设备和控制设备.第3部分:拟由普通人员操作的配电板(DBO)

[中文适用范围]： 本部分国际电工委员会（IEC）61439 标准规定了旨在由普通人员操作的配电板（DBO）的具体要求。DBO 具有以下标准： - 旨在由普通人员操作（例如开关操作和更换熔丝），例如在家庭（家用）应用中； - 出线回路包含旨在由普通人员操作的保护装置，符合例如 IEC 60898-1、IEC 61008、IEC 61009、IEC 62423 和 IEC 60269-3； - 对地额定电压不超过 300 V 交流电； - 出线回路的额定电流（I nc）不超过 125 A，且 DBO 的额定电流（I nA）不超过 250 A； - 旨在用于分配电能； - 封闭、固定式； - 适用于室内或室外使用。 DBO 还可包括与电能分配相关的控制和/或信号装置。 本标准适用于所有 DBO，无论它们是单独设计、制造和验证，还是完全标准化并批量生产。 DBO 可以在原始制造商的工厂之外进行组装。 本标准不适用于单个设备和独立组件，如断路器、熔断器开关、电子设备等，这些设备应符合相关的产品标准。 本标准不适用于 IEC 61439 其他部分涵盖的特定类型的成套设备。 [外文原描述]： IEC 61439-3:2012 defines the specific requirements for distribution boards intended to be operated by ordinary persons (DBO). DBOs have the following criteria: - intended to be operated by ordinary persons (e.g. switching operations and replacing fuse-links), e.g. in domestic (household) applications; - outgoing circuits contain protective devices, intended to be operated by ordinary persons, complying e.g. with IEC 60898-1, IEC 61008, IEC 61009, IEC 62423 and IEC 60269-3; - rated voltage to earth does not exceed 300 V a.c.; - rated current (Inc) of the outgoing circuits does not exceed 125 A and the rated current (InA) of the DBO does not exceed 250 A; - intended for the distribution of electrical energy; - enclosed, stationary; - for indoor or outdoor use. This first edition cancels and replaces the first edition of IEC 60439-3 (1990), Amendment 1 (1993) and Amendment 2 (2001). It constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60439-3 (including the amendments): - alignment with IEC 61439-1:2011. This publication is to be read in conjunction with IEC 61439-1:2011 . The contents of the corrigenda of September 2013 and March 2019 have been included in this copy.