本文件已被宣布为“稳定”，不再接受货币定期审查。用户负责验证参考资料和持续适用性或技术要求。新技术可能存在。本推荐规程涵盖了船用50 V DC或更低电压的磁性或热断路器的要求。本推荐规程的目的是确保规定的断路器能够可靠地提供过电流保护。

This document has been declared "Stabilized" and will no longer be subjected to periodic reviews for currency. Users are responsible for verifying references and continued suitability or technical requirements. New technology may exist.This recommended practice covers the requirements of magnetic or thermal circuit breakers for use in marine applications for 50 V DC or less. The purpose of this recommended practice is to ensure that the specified circuit breakers will reliably provide overcurrent protection.