I 14 15 Power Transformers PPrroodduucctt DDeevveellooppmmeenntt HHiissttoorryy Year Milestones Year Milestones 765kV Auto Transformer (1ph 765kV 500MVA) SF Gas Insulated Transformer 2010 2002 6 2 875MVA GSU Transformer (3ph 230/23kV 875MVA) (1ph, 154kV, 60MVA/Bank, 3.8kg/cm ) 2009 100MVA STATCOM 2001 154kV 40MVA Transformer for FACTS IED for preventive diagnosis of Transformer (IEC61850) 765kV Auto Transformer for commercial use 1999 765kV Auto Transformer (1ph, 765kV, 2000MVA/Bank) 2008 (1ph 765kV 500MVA & 765kV 333MVA) 1997 345kV Shunt Reactor (3ph, 345kV, 100MVAR & 200MVAR) 990MVA GSU Transformer (3ph 345kV 990MVA) 1992 765kV Transformer (1ph, 23/765kV, 3MVA) SF Gas Insulated Transformer 6 2007 2 1986 Amorphous Transformer (1ph, 154kV, 60MVA/Bank, 1.3kg/cm ) 1984 154kV phase-separated Transformer (3ph, 154kV, 386MVA) 2004 765kV GSU Transformer (1ph, 20.9/765kV 182.2/204MVA) 1978 345kV Auto Transformer (1ph, 345/161kV, 500MVA/Bank) 2003 154kV 80MVA unified power flow controller (FACTS) pilot plant 1969 154kV Power Transformer first in Korea (3ph, 154kV, 40MVA) Global NNetwork