Home / Standards / GB/T 27744 GB/T 27744 Active Specification and energy efficiency grades for line-start permanent magnet synchronous motors (frame size 80～355) 异步起动永磁同步电动机技术条件及能效分级（机座号80~355） Standard Type GBT ICS 29.160.30 CCS K21 Status 现行 Issue Date 2021-10-11 Implementation 2022-05-01 Responsible Dept 中国电器工业协会 Drafting Unit 中国电器工业协会