Home / Standards / GB/T 21707-2018 GB/T 21707-2018 Abolished Insulation specification for variable frequency adjustable speed definite purpose converter-fed three-phase induction motors 变频调速专用三相异步电动机绝缘规范 Standard Type GBT ICS 29.160.01 CCS K20 Status 废止 Issue Date 2018-06-07 Implementation 2019-01-01 Responsible Dept 中国电器工业协会 Drafting Unit N/A