Home / Standards / GB/T 20990.1-2020 GB/T 20990.1-2020 Active Thyristor valves for high voltage direct current (HVDC)power transmission—Part1: Electrical testing 高压直流输电晶闸管阀 第1部分:电气试验 Standard Type GBT ICS 29.200 CCS K46 Status 现行 Issue Date 2020-12-14 Implementation 2021-07-01 Responsible Dept 中国电器工业协会 Drafting Unit N/A