EWP

Our services

Retrofilling & Retrofitting

Extending the life of existing transformers while improving safety, reliability and performance is a priority for asset owners. EWP helps utilities and industrial clients upgrade existing units without full replacement.

Diagram of an online monitoring system installed on a power transformer

We support transformer modernisation through:

  • Replacement of mineral insulating oil with alternative fluids, such as natural or synthetic esters
  • Installation of online monitoring systems
  • Integration of offline diagnostic solutions
  • Upgrades of protection and auxiliary systems
  • Adaptation to new operational or environmental requirements

Retrofilling

Retrofilling replaces the existing insulating liquid with a higher-performance alternative.

  • Better fire safety, with higher flash and fire points
  • Greater environmental sustainability, with biodegradable fluids
  • Improved insulation performance
  • Potentially longer transformer life

We support the whole process: technical feasibility assessment, fluid selection and compatibility analysis, supervision and validation of the work.

Drawing of a transformer oil treatment and retrofilling unit
Treatment unit for insulating fluid replacement.

Retrofitting

Retrofitting upgrades existing transformers with modern technology. Typical upgrades include:

  • Online monitoring systems (temperature, moisture, DGA)
  • Smart sensors and condition monitoring devices
  • Digital integration for predictive maintenance
  • Cooling system improvements
  • Protection system upgrades

Our method

A safe, controlled and effective implementation through every phase of the project.

  1. Asset assessmentTransformer condition, design characteristics and operating constraints.
  2. Feasibility studyPotential risks, compatibility aspects and expected benefits.
  3. Engineering and designDefinition of the optimal solution.
  4. Implementation supportField operations supervised in coordination with qualified partners.
  5. Validation and monitoringConfirmation that the upgraded asset meets its technical and operational targets over time.

The result

Upgrading existing transformers instead of replacing them extends asset service life while reducing capital expenditure. Better safety, environmental performance and monitoring enable more reliable, data-driven asset management.

A more resilient and efficient operation, with higher availability and a lower risk of unexpected failures.