Home / Standards / GB/T 21420-2008 GB/T 21420-2008 Active General requirements for light-trigged thyristors for HVDC transmission 高压直流输电用光控晶闸管的一般要求 Standard Type GBT ICS 31.080.20 CCS K46 Status 现行 Issue Date 2008-01-22 Implementation 2008-09-01 Responsible Dept 中国电器工业协会 Drafting Unit N/A