Home / Standards / GB/T 37880-2019 GB/T 37880-2019 Active Technical guide for on-site ring network busbar protection 就地化环网母线保护技术导则 Standard Type GBT ICS 29.240.01 CCS K45 Status 现行 Issue Date 2019-08-30 Implementation 2020-03-01 Responsible Dept 中国电器工业协会 Drafting Unit N/A