Home / Standards / GB 20052-2006 GB 20052-2006 Abolished The minimum allowable values of energy efficiency and the evaluating values of energy conservation for three-phase distribution transformers 三相配电变压器能效限定值及节能评价值 Standard Type GB ICS 27.010 CCS F01 Status 废止 Issue Date 2006-01-09 Implementation 2006-07-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委