标准摘要
[中文适用范围]： IEC 60947-3:2020+AMD1:2025 CSV 适用于额定电压不超过 1 000 V AC 或 1 500 V DC 的配电电路和电动机电路中使用的开关、断路器、负荷开关和熔断器组合电器及其专用附件。第四版取消并取代了 2008 年发布的第三版、修正案 1:2012 和修正案 2:2015。此版本是技术修订。此版本相对于前一版包括以下重大技术变化： - 增加了直流开关的临界负载电流测试（见 9.3.9）； - 增加了对受断路器保护的断路器、开关和负荷开关的条件短路额定值要求（见 9.3.7.2）； - 增加了高效电机开关的新类别（见附件 A）； - 增加了有关与铝导线连接的新附件 E； - 增加了用于功率损耗测量的新附录F。2021年10月勘误表的内容已包含在此版本中。 [外文原描述]： IEC 60947-3:2020+AMD1:2025 CSV applies to switches, disconnectors, switch-disconnectors and fuse-combination units and their dedicated accessories to be used in distribution circuits and motor circuits of which the rated voltage does not exceed 1 000 V AC or 1 500 V DC. This fourth edition cancels and replaces the third edition published in 2008, Amendment 1:2012 and Amendment 2:2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - addition of critical load current tests for DC switches (see 9.3.9); - addition of requirements for a conditional short-circuit rating for disconnectors, switches, and switch-disconnectors protected by circuit-breakers (see 9.3.7.2); - addition of new categories for high-efficiency motors switching (see Annex A); - addition of new Annex E for connection to aluminium conductors; - addition of new Annex F for power losses measurement. The contents of the corrigendum of October 2021 have been included in this copy.
英文名称Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units