Retrofitting & Retrofilling
Extending the life of existing transformers while improving safety, reliability, and performance is a key priority for asset owners.
EWP provides advanced Retrofilling and Retrofitting solutions, supporting utilities and industrial clients in upgrading existing transformers without the need for full replacement.
We support transformer modernization through:
- Replacement of insulating mineral oil with alternative fluids (e.g. natural or synthetic esters)
- Installation of online monitoring systems
- Integration of offline diagnostic solutions
- Upgrading of protection and auxiliary systems
- Adaptation to new operational or environmental requirements
Retrofilling Solutions
Retrofilling consists in replacing the existing insulating liquid with high-performance alternatives.
Key benefits:
- Improved fire safety (higher flash and fire point)
- Enhanced environmental sustainability (biodegradable fluids)
- Increased insulation performance
- Potential extension of transformer lifetime
We support the full process, including:
- Technical feasibility assessment
- Fluid selection and compatibility analysis
- Execution supervision and validation
Retrofitting Solutions
Retrofitting allows upgrading existing transformers with modern technologies.
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 methodology ensures a safe, controlled, and effective implementation throughout all project phases.
We start with a detailed asset assessment, evaluating transformer condition, design characteristics, and operational constraints. Based on this, a technical feasibility study is carried out to identify potential risks, compatibility aspects, and expected benefits.
The optimal solution is then defined through dedicated engineering and design activities, followed by implementation support, where field operations are supervised in coordination with qualified partners.
Finally, we ensure proper validation and performance monitoring, confirming that the upgraded asset meets the expected technical and operational targets over time.
Our solutions are designed to deliver tangible technical and economic benefits.
By upgrading existing transformers instead of replacing them, our clients can significantly extend asset service life while reducing capital expenditure. At the same time, improvements in safety, environmental performance, and monitoring capabilities enable a more reliable and data-driven asset management approach.
The result is a more resilient and efficient operation, with increased availability and reduced risk of unexpected failures.