高压开关设备和控制设备第107部分:额定电压1kV以上52kV及以下交流熔断电路开关

[中文适用范围]： IEC 62271的这一部分适用于配电系统的三极操作单元，这些单元是断路器和限流熔断器的功能组件，设计用于：- 在额定恢复电压下断开任何负载或故障电流，包括额定短路断开电流；- 在额定电压下接通适用于额定短路断开电流的电路。 本部分适用于设计额定电压高于1kV至52kV的三极操作熔断式电路开关，用于50Hz或60Hz的三相交流系统。它们可以设计为独立设备，也可以嵌入开关设备和控制设备组件中。它们适用于仅需要正常机械和电气耐久能力的电路或应用。这些应用包括高压/低压变压器的保护，但不包括配电线路或电缆，以及电机电路和电容器组电路。 短路过电流条件，直至熔断式电路开关的额定接管电流，由辅助设备（触发器、继电器等）处理，正确布置，触发电路开关。限流熔断器被纳入以确保设备的短路断开能力高于单独的电路开关。 注1：在本文件中，术语“熔断器”用于指代熔断器或熔断器链路，其中文本的一般含义不会导致歧义。 本标准适用于设计额定电压高于1kV至52kV的熔断式电路开关，用于50Hz或60Hz的三相交流系统。与其他现有开关设备的比较在第8条中提供。 注2：存在其他电路开关；见参考。 需要依赖手动操作的设备不在本文件范围内。 熔断器由IEC 60282-1覆盖。 形成电路开关组成部分的接地开关由IEC 62271-102覆盖。 外壳中的安装（如果有）由IEC 62271-200或IEC 62271-201覆盖。 [外文原描述]： IEC 62271-107:2019 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 62271-107:2019 applies to three-pole-operated fused circuit-switchers designed with rated voltages above 1 kV up to and including 52 kV for use on three-phase alternating current systems of either 50 Hz or 60 Hz. This third edition cancels and replaces the second 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) technical changes introduced by the second edition of IEC 62271-1 are applied, where relevant; b) rated TRV is removed and TRV is now treated as a test parameter), as in IEC 62271-100; c) the term "thermal current" is no longer used; the rated continuous current is linked to the installed fuse-links, and values shall be provided by the manufacturer together with the list of the acceptable fuse-links; for tests purpose, the highest rated continuous current listed is referred, where previously the wording was "rated maximum thermal current", for consistency with IEC 62271-105; d) making and breaking test duties are independent type tests (as some may be omitted if the switching device has been validated as a load-break switch). However, TDIt0 and TDIlow are kept as a sequence as they are linked to the same rated value (It0); e) differentiation has been introduced between requirements expressed for fulfilling the function expected from a fused circuit-switcher, from requirements only relevant when the function is performed by a stand-alone device. The goal is to avoid duplication or conflicts of requirements with a standard dealing with assemblies, when the function is implemented within such an assembly.