Hitachi’s Kokubu factory located in Hitachi City, Japan is a highly sophisticated research and quality control facility that has been supplying large capacity power transformers to the worldwide market since 1910. Today, Hitachi has supplied over 6,800 units with power capacity up to 3,000 MVA and voltage up to 1,000 kV. In addition our new state of the art facility in Taichung, Taiwan opened in April, 2015. From these two factories, Hitachi can provide North American customers most of their requirements of 200MVA and larger.

Transformer Type

  • Generator Setup Up (GSU)
  • Auto
  • Phase-Shifting / Phase Regulating
  • HVDC Converter

Cooling Systems

  • Oil Natural Air Natural (ONAN)
  • Oil Natural Air Forces (ONAF)
  • Oil Direct Air Natural (ODAN)
  • Combination (ONAN/ONAF/ODAF)
  • Oil Direct Water Forced (ODWF)

Transformer Design Features

  • Single and Three Phase Available
  • HV Condenser Coupling Shield Winding
  • Hybrid Insulation
  • Design Analysis
  • Precise cutting and stacking of core material

Generator Step Up Transformer (GSU)
345 kV 1,036 MVA

Contact block

Tel: 1.770.495.1755
Fax: 1.770.623.9214
7250 McGinnis Ferry Rd.
Suwanee, GA 30024