低压开关设备和控制设备 第2部分：断路器

[中文适用范围]： IEC 60947-2:2024 RLV 包含官方 IEC 国际标准及其红线版本。红线版本仅提供英文版，可让您快速轻松地比较官方 IEC 标准与其先前版本之间的所有变化。IEC 60947-2:2024 适用于由受过指导或熟练的人员安装和操作的断路器，其主触点旨在连接到额定电压不超过 1 000 V AC 或 1 500 V DC 的电路；它还包含对整体熔断断路器的附加要求。本文件还适用于额定电压等于或低于 1 000 V AC 的断路器，另外还有一个或多个额定电压高于 1 000 V AC 但不超过 1 500 V AC。第六版取消并取代了 2016 年发布的第五版及其修订版 1：2019。此版本是技术修订。此版本与前一版相比包括以下重大技术变化：a) 隔离适用性（见第 1 章）；b) 删除了根据中断介质、根据设计和根据隔离适用性的分类（见第 4 章）；c) 使用可连接到脱扣器的外部设备调整电流设定（见 5.7.3）；d) 对带保护分离的电路的要求（见 8.2.3.8）；e) 接地故障过流脱扣器的附加试验（见 9.3.4.2.5）；f) 有关脱扣位置介电性能的附加试验（见 9.3.4.3）；g) 使用直流电压进行介电试验（见 9.3.4.6.2 和 9.4.6）； h) 在相线-中性线交流电压下单极分断能力试验（见 9.3.11）；i) 改进了附录 G 中的功率损耗测量；j) 改变了 EMC 试验（见附录 J）；k) 在附录 L 中引入了 CBI 等级 W。 [外文原描述]： IEC 60947-2:2024 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60947-2:2024 applies to circuit-breakers, intended to be installed and operated by instructed or skilled persons, the main contacts of which are intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V AC or 1 500 V DC; it also contains additional requirements for integrally fused circuit-breakers. This document also applies to circuit-breakers with ratings at or below 1 000 V AC, additionally having one or more ratings above 1 000 V AC but not exceeding 1 500 V AC. This sixth edition cancels and replaces the fifth edition published in 2016 and its Amendment 1: 2019. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) suitability for isolation (see Clause 1); b) removal of the classification according to the interrupting medium, according to the design, according to the suitability for isolation (see Clause 4); c) adjustment of current settings with an external device connectable to the release (see 5.7.3); d) requirements for circuits with protective separation (see 8.2.3.8); e) additional tests for ground-fault overcurrent releases (see 9.3.4.2.5); f) additional tests concerning dielectric properties in tripped position (see 9.3.4.3); g) use of DC voltage for dielectric tests (see 9.3.4.6.2 and 9.4.6); h) tests of individual pole breaking capacity under phase-to-neutral AC voltage (see 9.3.11); i) improvement of measurement of power loss in Annex G; j) changes in EMC tests (see Annex J); k) introduction of CBI class W in Annex L.