This project represents a key contribution to Finland’s energy transition, supporting the integration of a high-capacity electric boiler (E-boiler) into the national grid. It reflects Protrafo’s commitment to delivering reliable transformer solutions for innovative, sustainable energy applications.
The 16 MVA oil-filled power transformer was custom-designed to handle variable load conditions and ensure optimal performance under the dynamic demands of E-boiler operation. Equipped with ONAN cooling, the unit was manufactured and tested according to the latest IEC standards, and delivered with complete project documentation.
Through this delivery, Protrafo enables long-term operational stability, energy efficiency, and full compliance with ECODESIGN Tier 2 regulations. Our involvement included coordination of logistics, support during installation and commissioning, and ongoing technical assistance—ensuring peace of mind for the client and a robust solution for the Finnish grid.
From the initial technical consultation to final commissioning, Protrafo provides full project management to ensure smooth execution and timely delivery. Our team coordinates all phases—from design review and production planning to logistics, on-site installation, and testing. By maintaining close communication with all stakeholders, we ensure that every step aligns with the project timeline, technical requirements, and site-specific conditions. This integrated approach minimizes risks, reduces downtime, and guarantees a successful transformer deployment.
Built to perform under continuous high power demand in transmission and industrial grids, with superior thermal and mechanical stability.
Designed for stable voltage regulation and efficient energy transfer in complex network environments, including peak load situations.
Engineered specifically for large-scale electric boiler integration, enabling clean, fossil-free heat generation with high efficiency and grid stability—supporting the transition to sustainable district heating.
Tested under full load conditions and compliant with the latest EU efficiency standards—ensuring minimal losses and maximum reliability.
Yes, we provide on-site coordination and, if required, technical assistance to ensure a smooth installation process.
Power transformers operate at higher voltages and are optimized for maximum efficiency under full load, typically used in transmission networks. Distribution transformers work at lower voltages and are designed for variable loads closer to end users.
A power transformer is an electrical device used to transfer high-voltage electrical energy between circuits, typically within power generation, transmission, and distribution systems. It adjusts voltage levels to ensure efficient long-distance power transmission and safe delivery to end users. Power transformers are essential in maintaining grid stability and energy efficiency.
We use specialized heavy-load carriers to ensure safe and stable transport. Depending on the transformer size and weight, we arrange road, sea, or multimodal transport.
Every transformer is professionally packaged and secured according to industry standards. We work with experienced logistics partners to minimize risks during transport.
Protrafo was called in to perform a critical repair on a medium-voltage transformer at a solar park in Sleen, located in the northeast of the Netherlands. The transformer showed signs of irregular operation, threatening downtime for the entire PV installation.
Following a rapid assessment by our service team, the fault was traced to an internal insulation issue. The transformer was carefully disconnected and transported to our workshop for a full inspection and repair.
The repair scope included:
Partial rewinding of the high-voltage winding
Oil filtration and replacement with fresh insulating oil
Thermal and insulation testing according to IEC standards
Final functional test and on-site recommissioning
Thanks to Protrafo’s efficient repair process and close coordination with the site operator, the transformer was back in operation within a matter of days—ensuring continued renewable energy production without long-term disruption.
This project underlines Protrafo’s strength in fast, reliable service for renewable energy applications across the Netherlands and beyond.
Protrafo takes a structured, hands-on approach to every transformer repair project. From initial fault diagnosis to final recommissioning, we manage the entire process to minimize downtime and restore operational reliability as quickly as possible. Our team coordinates transport (if required), arranges testing, sources critical components, and ensures that repairs meet all relevant standards. Whether on-site or in our workshop, every step is carefully managed with clear communication and technical precision—so you can focus on your operations while we restore your transformer to full performance.
Fast turnaround on critical repairs
Every unit is tested according to IEC standards to ensure full reliability.
Field services available for inspections, minor repairs, and condition assessments.
From coil rewinding to ECODESIGN compliance—your transformer, up to date and future-ready.
Cast resin (dry-type) transformers require minimal maintenance. Routine visual inspections, dust removal, and checking for signs of overheating or insulation wear are usually sufficient. Unlike oil-filled units, they do not require oil testing or leak monitoring, making them ideal for low-maintenance environments.
The typical lifespan of a transformer ranges from 25 to 40 years, depending on the type, load conditions, maintenance, and operating environment. With proper care and monitoring, such as using systems like Protrafo Insights®, transformers can operate reliably for several decades.
Yes, we provide on-site coordination and, if required, technical assistance to ensure a smooth installation process.
Yes, Protrafo provides on-site diagnostics and repairs where possible, including thermal imaging, insulation tests, and minor component replacement. For complex repairs, the transformer may be transported to our partner facilities.
Repair lead times vary based on damage severity and parts availability. However, with our dedicated service team and stock of critical components, we can often provide rapid turnaround, including emergency interventions.
Protrafo has supplied a 10 MVA oil-filled power transformer for a grid-connected electric boiler (E-boiler) project in Finland. The transformer plays a key role in supporting the customer’s transition to clean, electrified heat production—contributing to national and EU climate goals.
The unit was custom-engineered to meet the dynamic load conditions typical of E-boiler systems, with special attention to thermal performance, voltage stability, and grid compatibility. Equipped with ONAN cooling and designed according to IEC standards, the transformer meets all technical and environmental requirements, including ECODESIGN Tier 2 compliance.
Protrafo managed the full scope of supply, including production, factory testing, transport coordination, and on-site commissioning support. The transformer was successfully delivered and installed within the agreed project timeline.
This project showcases Protrafo’s ability to deliver tailored transformer solutions for the growing field of electric heat infrastructure across Europe.
With this delivery, Protrafo once again proves its strength in managing complex transformer projects from design to installation—ensuring reliable power conversion for innovative energy systems. As electrification of heat gains momentum, we continue to support our partners with flexible, high-quality solutions that power the future of sustainable energy.
Designed to match your exact voltage, cooling, and installation requirements—up to 50 MVA and 110 kV.
Minimized losses and long-term energy savings, fully compliant with European standards.
Access live transformer data anytime via our cloud platform for smarter asset management.
From production to on-site delivery and installation—handled quickly and professionally across Europe.
A power transformer is an electrical device used to transfer high-voltage electrical energy between circuits, typically within power generation, transmission, and distribution systems. It adjusts voltage levels to ensure efficient long-distance power transmission and safe delivery to end users. Power transformers are essential in maintaining grid stability and energy efficiency.
Power transformers operate at higher voltages and are optimized for maximum efficiency under full load, typically used in transmission networks. Distribution transformers work at lower voltages and are designed for variable loads closer to end users.
Power transformers are commonly used in voltage ranges above 36 kV, with typical primary voltages of 110 kV, 150 kV, or higher, and secondary voltages around 10 to 36 kV.
We use specialized heavy-load carriers to ensure safe and stable transport. Depending on the transformer size and weight, we arrange road, sea, or multimodal transport.
Yes, we provide on-site coordination and, if required, technical assistance to ensure a smooth installation process.
When a medium-voltage transformer at a solar park in the Netherlands suffered a sudden short circuit, Protrafo was called in to provide a fast and reliable recovery. The incident had temporarily halted energy production, making a swift repair critical to minimize downtime and restore grid contribution.
Our service team performed an on-site inspection and coordinated the transport of the faulty transformer to one of our certified repair partners. The recovery process included:
Comprehensive diagnostic testing
Replacement of damaged windings
Oil filtration and refill with fresh insulating oil
Insulation testing and thermal performance checks
Final acceptance test according to IEC standards
Once repaired, the transformer was returned to site, reinstalled, and recommissioned under Protrafo’s supervision. The solar park was back in operation within a short timeframe—ensuring continued contribution to renewable energy generation.
This case demonstrates our ability to combine technical expertise, logistical coordination, and rapid service to keep green energy projects running smoothly.
This successful recovery project underscores Protrafo’s ability to respond quickly to unexpected failures and support renewable energy providers with expert repair solutions. By combining technical know-how, rapid logistics, and close customer coordination, we help ensure the resilience and uptime of solar installations across the Netherlands and beyond.
Fast turnaround on critical repairs
Every unit is tested according to IEC standards to ensure full reliability.
Field services available for inspections, minor repairs, and condition assessments.
From coil rewinding to ECODESIGN compliance—your transformer, up to date and future-ready.
Yes, Protrafo provides on-site diagnostics and repairs where possible, including thermal imaging, insulation tests, and minor component replacement. For complex repairs, the transformer may be transported to our partner facilities.
Repair lead times vary based on damage severity and parts availability. However, with our dedicated service team and stock of critical components, we can often provide rapid turnaround, including emergency interventions.
The typical lifespan of a transformer ranges from 25 to 40 years, depending on the type, load conditions, maintenance, and operating environment. With proper care and monitoring, such as using systems like Protrafo Insights®, transformers can operate reliably for several decades.
Cast resin (dry-type) transformers require minimal maintenance. Routine visual inspections, dust removal, and checking for signs of overheating or insulation wear are usually sufficient. Unlike oil-filled units, they do not require oil testing or leak monitoring, making them ideal for low-maintenance environments.
Transformer oil serves two key purposes: insulation and cooling. It insulates internal components to prevent electrical faults and helps dissipate heat generated during operation. High-quality mineral or synthetic oils, such as MIDEL, also enhance fire safety and extend transformer lifespan.