本标准适用于额定标称电压高于1000 V的交流高压断路器。本标准规定了额定结构、首选额定值、结构和功能部件要求。本标准包括以下内容: -三相系统中使用的三极断路器 -单相系统中使用的单极断路器 -这些断路器的附件，如套管、电流互感器、联锁装置、并联跳闸装置等，以及与断路器一起出售的辅助设备，如闭合继电器和结构钢支架。 本标准不包括频率为50 Hz或60 Hz以外的断路器或IEC/IEEE Std 62271-37-013中涵盖的发电机断路器

This standard applies to ac high-voltage circuit breakers with rated nominal voltage above 1000 V. It establishes a rating structure, preferred ratings, construction and functional component requirements. This standard encompasses the following: - Three pole circuit breakers used in three-phase systems - Single pole circuit breakers used in single-phase systems - Attachments for these circuit breakers, such as bushings, current transformers, interlocks, shunt trips, etc., and auxiliary equipment sold with the circuit breakers such as closing relays and structural steel supports. This standard does not cover circuit breakers used at frequencies other than 50 Hz or 60 Hz or generator circuit breakers that are covered in IEC/IEEE Std 62271-37-013