HV/MV Equipment
Oil-insulated Current Transformer up to 800 kV

Grid Solutions > HV/MV Equipment > Instrument Transformers > OSKF

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Oil-Insulated Current Transformers up to 800 kV

GE’s OSKF have been designed for a 30 year lifetime and, thanks to the profound technical concepts, many well out-live this service life. The oil is hermetically sealed from the air by a stainless steel diaphragm assembly and all external parts are of corrosion-resistant material.

Customer Benefits

  • Special accuracy classes for protection: TPS, TPX, TPY, PR
  • World leader in seismic solutions
  • Expertise in 800 kV
  • Stable accuracy over its life time
  • Maintenance free
  • Design verified by extensive field experience
  • Protection against bursting


  • 72.5 to 800 kV
  • Up to 5,000 A
  • In short-circuit: up to 80 kA1”(Isc dyn: 200 - kA peak)
  • Secondary cores: up to 8
  • Oil expansion by stainless steel bellows
  • Oil level indicator
  • Available high and extended range accuracy design (ERCT)
  • Compliance with IEC and IEEE or equivalent standards
  • DC current transformers available