本推荐规程提供了为特定应用选择合适断路器的信息。本推荐规程有助于应用工程师指定断路器的类型、额定值、跳闸功能、附件、验收测试和维护要求。它还讨论了特殊应用的断路器，例如，仅限瞬时和开关。此外，它还提供了在电力系统不同位置使用断路器以及保护特定部件的信息。给出了协调线路侧和负载侧设备组合的指南。提供验收测试和维护指南，以便验证和维护可靠运行。本推荐规程不包括断路器的选择和应用，如船用断路器和专用断路器。

This recommended practice provides information for selecting the proper circuit breaker for a particular application. This recommended practice helps the application engineer specify the type of circuit breaker, ratings, trip functions, accessories, acceptance tests, and maintenance requirements. It also discusses circuit breakers for special applications, e.g., instantaneous only and switches. In addition, it provides information for applying circuit breakers at different locations in the power system and for protecting specific components. Guidelines are given for coordinating combinations of line-side and loadside devices. Acceptance testing and maintenance guidelines are provided so that reliable operation can be verified and maintained. This recommended practice does not cover the selection and application of circuit breakers such as marine circuit breakers and definite purpose circuit breakers.