Protrafo's cast-resin transformers combine premium quality, safety and efficiency with excellent resistance to moisture, dust and temperature extremes. Their maintenance-free design and low energy losses make them the ideal choice for demanding indoor and outdoor applications.
Compliant with IEC 60076-11 and EU TIER 2 Ecodesign requirements, our dry-type transformers are widely used in hospitals, data centres, tunnels, offshore platforms, BESS installations, and renewable energy projects where fire safety and environmental protection are critical.
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02The Protrafo standard
Why choose Protrafo?
01
Fast delivery
At Protrafo, we understand the urgency of your energy needs. That's why we guarantee rapid production and shipping, ensuring your transformer arrives on time, every time – no delays, no excuses!
02
Built to IEC 60076
All Protrafo transformers are designed and manufactured in strict accordance with IEC 60076 standards, ensuring the highest levels of safety, performance, and reliability across all applications.
03
EU-wide 24/7 service
Our dedicated service team is available around the clock, 365 days a year, across the entire European Union – ready to respond swiftly to any situation, wherever you are.
04
Up to 5 year warranty
We stand behind the quality of every transformer we build. Protrafo offers industry-leading warranty coverage of up to five years, giving you complete peace of mind.
03Specifications
Key features
Low Maintenance
Cast resin insulation requires no oil monitoring or replacement. Routine visual inspection and dust removal are all that is typically needed throughout the transformer's service life.
Noise Reduction
Solid cast resin encapsulation absorbs vibrations and reduces acoustic emissions — ideal for noise-sensitive locations such as hospitals, offices, and residential buildings.
Versatile Applications
Suitable for indoor and outdoor use in commercial buildings, tunnels, offshore platforms, data centres, hospitals, BESS systems, and solar parks.
Sustainable and Efficient
Meets EU TIER 2 Ecodesign requirements for reduced no-load and load losses. No oil means no risk of oil leaks or contamination of soil or groundwater.
Long Lifespan
With a service life of 25 to 40 years, cast resin transformers deliver exceptional reliability and a low total cost of ownership over time.
Easy Installation
Compact footprint and modular design allow installation in confined spaces. Available with protective enclosures for complete IP-rated solutions.
Global Standards Compliance
Designed and tested to IEC 60076-11 and relevant EU directives. F1-class fire behaviour rated, making them the safest choice for public and sensitive environments.
BESS & Solar Ready
Handles the harmonics and cyclic loads generated by inverters, making them the preferred choice for battery energy storage systems and solar park connections.
—Available option
IP21 touch-safe enclosure
Deploy a dry-type transformer safely in accessible spaces. Our factory-fitted IP21 enclosure shields the windings and live parts against accidental contact and the ingress of fingers and small objects, while ventilation louvres preserve the transformer's natural air cooling.
IP21 ingress protection
Touch-safe / finger-safe
Ventilated for natural cooling
Factory-fitted & tested
IP21 enclosure fitted around a cast resin transformer — touch-safe deployment in accessible areas.
Protrafo delivered our distribution units ahead of schedule and the factory test reports were spotless. Talking to the same engineers from quote to commissioning made all the difference.
Project Manager
Regional grid operator · Netherlands
Start your project
Get pricing for your transformer
Choose a fast budget indication in three fields, or a full formal quote — valid for 30 days.
At Protrafo, every transformer goes through a streamlined process — from engineering to delivery. Each step is handled by specialists to ensure top quality and reliability.
1
Engineering & Design
Engineered to your specifications: voltage ratio, capacity, losses, climate class, and protective enclosure — all calculated for your project.
2
Production
High-pressure resin casting in climate-controlled facilities, ensuring perfect encapsulation and consistent insulation quality on every unit.
3
Testing
Routine and type tests per IEC 60076-11, including partial discharge measurements, to verify insulation integrity and electrical performance.
4
Logistics
Carefully packaged and shipped with experienced logistics partners to ensure safe, on-time delivery anywhere in Europe.
5
Commissioning
On-site installation support and commissioning assistance available on request to ensure safe energization of your transformer.
05Tested & documented
Quality you can verify.
Every transformer is tested, certified and shipped with the paperwork to prove it — so what you specify is exactly what you energise.
Routine tested — every unit
Each transformer completes full routine testing before it leaves our factory. No exceptions.
Type & special tests to IEC 60076
Temperature-rise, short-circuit and dielectric tests available on request — witnessed if you wish.
Test report with every unit
You receive the complete factory acceptance test certificate with each transformer we deliver.
Warranted & EU-stocked
Up to a five-year warranty, ex-stock units and rapid EU-wide delivery — backed 24/7.
Certified management systems
06Answers
Frequently Asked Questions
Frequently asked questions about cast resin transformers. Can't find your answer? Request a quote — or explore our oil-type transformers and power transformers.
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 transformers, there is no oil to sample, top up, or replace.
Dry-type transformers use air for cooling and solid insulation, making them suitable for indoor environments where fire safety is a concern. Oil-filled transformers use liquid insulation and oil for cooling — making them ideal for outdoor use and higher capacities.
For indoor installations, cast resin (dry-type) transformers are typically preferred. They are fire-safe, require minimal maintenance, and are well-suited for environments like commercial buildings, hospitals, data centres, tunnels, and parking garages.
The typical lifespan ranges from 25 to 40 years, depending on the type, load conditions, maintenance, and operating environment. With proper care and monitoring, such as temperature management and regular inspections, a long service life can be expected.
Yes, we provide on-site coordination and, if required, technical assistance to ensure a smooth installation process.
Cast resin transformers are the preferred choice wherever fire safety and the environment are critical: inside buildings, parking garages, tunnels, hospitals, data centres, offshore installations, and anywhere oil contamination would pose an environmental risk.
Yes. Cast resin transformers are frequently used in battery energy storage systems (BESS) and solar projects. They handle the harmonics and cyclic loads generated by inverters well, require minimal maintenance, and are safe for use in outdoor enclosures.
Start your project
Ready to take your energy infrastructure to the next level?
Get an indicative budget price in three fields, or a full formal quote — valid for 30 days. We typically respond within one business day.
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