This document specifies the basic requirements, classification and characteristics, product information, normal working and installation conditions, structural and performance requirements, test methods, inspection rules, packaging, transportation and storage, quality of plastic case circuit breakers (hereinafter referred to as circuit breakers) promise. This document is applicable to circuit breakers whose main contacts are used to connect to AC 50 Hz, 60 Hz or 50 Hz/60 Hz and with a rated voltage not exceeding 1 000 V (for circuit breakers with a voltage higher than 1 000 V AC but not exceeding 1 500 V Circuit breakers can refer to this document).