Home / Standards / GB/T 21971-2020 GB/T 21971-2020 Active YZD series multi-speed three-phase induction motors for crane application—Technical specification YZD系列起重用多速三相异步电动机 技术条件 Standard Type GBT ICS 29.160.30 CCS K26 Status 现行 Issue Date 2020-11-19 Implementation 2021-06-01 Responsible Dept 中国电器工业协会 Drafting Unit N/A