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2020-

2025
- OCT
  Developed a 25.8 kV standard air-insulated load break switch (underground type) for KEPCO.
- OCT
  Developed a transformer for on-load tap changer (OLTC) protection.
2024
- FEB
  Developed 500 kV HVDC 3- and 6-bundle spacer dampers and aluminum pipe jumper devices.
- JUN
  Developed 72.5 kV Eco-Friendly Gas-Insulated Switchgear (EGIS) for offshore wind power applications.
- JUL
  Developed a 154 kV single-phase transformer using synthetic ester oil.
- OCT
  Developed a 154 kV polypropylene(PP) insulated cable.
- OCT
  Expanded the Extra-High-Voltage Transformer manufacturing plant in Hongseong.
- NOV
  Developed a 154 kV single-phase seismic-reinforced transformer.
2023
- MAR
  Completed development of KEPCO 154kV 3-phase gas transformer
2022
- APR
  Completed development of 29kV eco-friendly GIS for railway
- Completed development of 154kV variable Shunt Reactor
2021
- JUN
  First domestic development of 154kV air-cooled gas TR
- NOV
  UK National Grid 400kV PQ registration
- DEC
  Completed HVDC 320kV cable system Type Test (KEMA)
2020
- DEC
  Development of 154kV Shunt Reactor
- DEC
  Delivered 500kV 350MVA to USA in Dec 2020

2012 - 2019

2019
- JAN
  Development of export-type 420kV gas insulated transformer
2018
- JUN
  Technical cooperation agreement with Siemens Germany for eco-friendly gas insulated transformer development
- SEP
  Completion of circuit breaker factory in Hongseong Industrial Complex
2017
- DEC
  Development of 362kV gas insulated transformer
2014
- MAY
  KERI certification acquired (245kV 40kA GIS)
2013
- APR
  Completion of transformer factory in Hongseong Industrial Complex
- JUN
  First delivery of 345kV 448MVA transformer from Hongseong factory in 2013
- NOV
  First domestic development of 400kV smooth sheath cable system in 2013
2012
- OCT
  First domestic delivery of 66kV smooth sheath cable (Australia)

2008 - 2011

2011
- MAR
  Completed development of 400kV HV Cable
2010
- DEC
  Sales exceeded 1 trillion won
2009
- SEP
  Acquired 220kV 125MVA transformer KEMA certification
2008
- JUL
  Conversion to holding company (Iljin Holdings)
- DEC
  Received Gold Tower Industrial Medal

2004 - 2007

2007
- Aluminium Rod 양산 개시
- AUG
  Received 300 million dollar export tower award
- NOV
  Merger with Iljin Heavy Industries Co., Ltd.
2006
- NOV
  Received 100 million dollar export tower award
2004
- DEC
  Acquired qualification for delivery of ultra-high voltage electric railway power supply Scott transformer

ILJIN Electric