American National Standard for AC High-Voltage Circuit Breakers - Rated on a Symmetrical Current Basis - Preferred Ratings and Related Required Capabilities
美国交流高压断路器国家标准——基于对称电流的额定值——首选额定值和相关要求的能力
This standard is applicable to three-pole circuit breakers used in three-phase systems and single-pole circuit breakers used in single-phase systems, both indoor and outdoor AC high-voltage types, rated above 1000 volts on a symmetrical current basis. This standard does not cover circuit breakers used at rated frequencies other than 50 Hz or 60 Hz, or generator circuit breakers that are covered in IEEE Std. C37.013.