Explore GE Vernova
Resource Library
Get access to curated content, tools, and useful resources to help you face all your grid challenges.
Access the library
Electrification Businesses
Electrification Software
Power Conversion
Solar & Storage Solutions
HV/MV Equipment
Oil-insulated Current Transformer up to 800 kV

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

Related Links
  ITR Overview
  ITR Services
  Asset Management

Oil-Insulated Current Transformers (CT) 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, TPZ, PR
  • World leader in seismic solutions
  • Expertise in 800 kV
  • Stable accuracy over its lifetime
  • Maintenance free
  • Design verified by extensive field experience
  • Protection against bursting


  • 72.5 to 800 kV
  • Up to 6,000 A
  • In short-circuit: up to 120 kA1” (Isc dyn: 324 - 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