Home / Standards / GB 24790-2009 GB 24790-2009 Abolished Minimum allowable values of energy efficiency and the energy efficiency grades for power transformers 电力变压器能效限定值及能效等级 Standard Type GB ICS 27.010 CCS F01 Status 废止 Issue Date 2009-12-15 Implementation 2010-07-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委