... ,CTQC,ISO9001,ISO14001,OHSAS18001 2.Apply for IEC,ANSI 3.oil immersed power transformer 4.5 years warran The three- ... the standard1. GB1094.1 ~ 2-1996 power transformer2. GB1094.3, 5-2003 power transformer3. GB/T6451-2008 oil-immersed three-phases ... transformer power technical parameters and requirements4.IEC4/ performance ...