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# Protrafo B.V.: High-quality transformer solutions with fast delivery and expert support.

## Sitemaps
[XML Sitemap](https://protrafo.com/sitemap_index.xml): Includes all crawlable and indexable pages.

## Pages
- [Transformers for BESS & Solar Projects](https://protrafo.com/transformers-bess-solar/): Grid connection transformers for BESS, solar parks and e-charging hubs. Built for fluctuating loads and 100% outdoor operation. Fast delivery across Europe!
- [Cookie Policy (EU)](https://protrafo.com/cookie-policy-eu/): This Cookie Policy was last updated on October 31, 2025 and applies to citizens and legal permanent residents of the European Economic Area and Switzerland.
- [Knowledge base](https://protrafo.com/knowledge-base/)
- [Home](https://protrafo.com/)
- [Inventory](https://protrafo.com/inventory/)
- [Sections](https://protrafo.com/sections/)
- [service-request](https://protrafo.com/service-request/)
- [Get a quote](https://protrafo.com/get-a-quote/)
- [About Us](https://protrafo.com/about/)
- [Contact](https://protrafo.com/contact/)
- [Projects](https://protrafo.com/projects/)
- [Service](https://protrafo.com/services/)
- [Terms & Conditions](https://protrafo.com/terms-conditions/)
- [Power transformers](https://protrafo.com/power-transformers/)
- [Cast Resin Transformers](https://protrafo.com/cast-resin-transformers/)
- [Oil-type Distribution Transformers](https://protrafo.com/oil-type-distribution-transformers/)
- [Privacy Policy](https://protrafo.com/privacy-policy/): An anonymized string created from your email address (also called a hash) may be provided to the Gravatar service to see if you are using it. The Gravatar service privacy policy is available here: https://automattic.com/privacy/. After approval of your comment, your profile picture is visible to the public in the context of your comment.

## FAQ's
- [Which standards do Protrafo power transformers comply with?](https://protrafo.com/faq/which-standards-do-protrafo-power-transformers-comply-with/): Protrafo power transformers are designed and tested in accordance with the IEC 60076 series, the international standard for power transformers. Units delivered within the European Union also comply with the EU EcoDesign Regulation (Tier 2), which sets strict limits on load and no-load losses. Routine tests are performed on every transformer before shipment, and type or special tests can be arranged on request as part of the factory acceptance test.
- [Can Protrafo deliver power transformers from stock?](https://protrafo.com/faq/can-protrafo-deliver-power-transformers-from-stock/): Selected units are available from stock, but most power transformers are engineered to order because grid operators and industrial clients require specific voltages, impedances and cooling configurations. Our online inventory shows which transformers are available for immediate delivery. For project-specific power transformers up to 100 MVA, request a quote and our engineering team will confirm the specification and the current production lead time.
- [Are cast resin transformers suitable for BESS and solar projects?](https://protrafo.com/faq/are-cast-resin-transformers-suitable-for-bess-and-solar-projects/): 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 can be installed inside compact stations close to the converters. Protrafo supplies transformers specifically configured for BESS and solar applications, including the required vector groups and low-loss designs under the EU EcoDesign Tier 2 regulation.
- [When should I choose a cast resin transformer instead of an oil-type transformer?](https://protrafo.com/faq/when-should-i-choose-a-cast-resin-transformer-instead-of-an-oil-type-transformer/): Cast resin (dry-type) transformers are the preferred choice wherever fire safety and the environment are critical: inside buildings, parking garages, tunnels, hospitals, data centres, offshore installations and ships. Because they contain no oil, there is no risk of leakage and no need for an oil containment pit, and their F1 fire behaviour classification allows installation close to people and sensitive equipment. For standard outdoor applications, an oil-type transformer usually remains the more economical option.
- [Are oil-type distribution transformers suitable for outdoor installation?](https://protrafo.com/faq/are-oil-type-distribution-transformers-suitable-for-outdoor-installation/): Yes. Oil-type distribution transformers are the standard choice for outdoor use. The hermetically sealed tank protects the active part against moisture and contamination, while the mineral oil provides both insulation and cooling. With the appropriate protection class and a corrosion-resistant finish, they perform reliably in substations, solar parks, industrial sites and other outdoor environments across all European climate zones.
- [What are the delivery times for oil-type distribution transformers?](https://protrafo.com/faq/what-are-the-delivery-times-for-oil-type-distribution-transformers/): Delivery times depend on the specifications and current market conditions. Standard oil-type distribution transformers are regularly available directly from our stock in Emmen, which means delivery within days rather than months. Custom-built units with specific voltages, vector groups or accessories are produced to order; lead times for these are considerably longer, so early planning pays off. Check our online inventory for transformers that are available immediately, or request a quote and we will confirm the exact lead time for your specification.
- [What happens if I need a transformer for longer than expected?](https://protrafo.com/faq/what-happens-if-i-need-a-transformer-for-longer-than-expected/): Our rental agreements are flexible. You can extend the rental period as needed, and we’ll ensure continued support and performance monitoring throughout.
- [Is storage possible for customer-owned transformers?](https://protrafo.com/faq/is-storage-possible-for-customer-owned-transformers/): Absolutely. Protrafo offers secure indoor and outdoor storage for transformers, including regular inspections and optional reconditioning to keep your equipment in top condition.
- [Can Protrafo assist with installation and connection?](https://protrafo.com/faq/can-protrafo-assist-with-installation-and-connection/): Yes, our team provides on-site support for safe installation, electrical connection, and operational setup. We also offer temporary monitoring solutions such as Protrafo Insights® if needed.
- [What types of transformers are available for rent?](https://protrafo.com/faq/what-types-of-transformers-are-available-for-rent/): Protrafo offers a range of oil-filled and dry-type transformers for rent, covering both low-voltage and medium-voltage applications. Units are available in various capacities to match your specific project needs.
- [Can Protrafo Insights® be integrated into existing systems?](https://protrafo.com/faq/can-protrafo-insights-be-integrated-into-existing-systems/): Yes, integration with SCADA or other energy management systems is possible via standard communication protocols such as Modbus or IEC 61850.
- [How is the data accessed?](https://protrafo.com/faq/how-is-the-data-accessed/): All data is securely transmitted to the cloud and can be accessed through a dedicated online dashboard with user-friendly visualization and alert settings.
- [Is Protrafo Insights® suitable for all transformer types?](https://protrafo.com/faq/is-protrafo-insights-suitable-for-all-transformer-types/): Yes, it can be installed on both oil-filled and dry-type transformers, regardless of whether they are new or existing transformers, as long as there is physical access to place the sensor.
- [Which parameters can be monitored?](https://protrafo.com/faq/which-parameters-can-be-monitored/): Typical parameters include oil and winding temperature, load current, ambient conditions, humidity, and partial discharge trends. Additional sensors can be integrated on request.
- [What are the benefits of using Protrafo Insights®?](https://protrafo.com/faq/what-are-the-benefits-of-using-protrafo-insights/): It enables preventive maintenance, reduces unplanned downtime, and extends transformer lifespan by giving operators full visibility into transformer health and operating conditions.
- [What is Protrafo Insights®?](https://protrafo.com/faq/what-is-protrafo-insights/): Protrafo Insights® is a smart transformer monitoring system that provides real-time data on key performance parameters such as temperature, load, oil condition, and more—accessible via a secure online cloud portal.
- [How quickly can a transformer be repaired?](https://protrafo.com/faq/how-quickly-can-a-transformer-be-repaired/): 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.
- [Does Protrafo offer on-site repair services?](https://protrafo.com/faq/does-protrafo-offer-on-site-repair-services/): 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.
- [What are the typical voltage levels for power transformers?](https://protrafo.com/faq/what-are-the-typical-voltage-levels-for-power-transformers/): 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.
- [How is a power transformer different from a distribution transformer?](https://protrafo.com/faq/how-is-a-power-transformer-different-from-a-distribution-transformer/): 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.
- [How do you ensure transformers are transported safely?](https://protrafo.com/faq/how-do-you-ensure-transformers-are-transported-safely/): Every transformer is professionally packaged and secured according to industry standards. We work with experienced logistics partners to minimize risks during transport.
- [Which countries or regions are covered by Protrafo’s project transport?](https://protrafo.com/faq/which-countries-or-regions-are-covered-by-protrafos-project-transport/): Protrafo delivers across Europe, with a focus on the Netherlands, Belgium, Germany, Austria, and Scandinavia. Thanks to our stock in Emmen (NL) and experienced logistics partners, we ensure fast and reliable transport to any project site. Custom solutions for non-European deliveries are available on request.
- [What transport methods do you use for transformers?](https://protrafo.com/faq/what-transport-methods-do-you-use-for-transformers/): 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.
- [Do you offer on-site delivery and installation support?](https://protrafo.com/faq/do-you-offer-on-site-delivery-and-installation-support/): Yes, we provide on-site coordination and, if required, technical assistance to ensure a smooth installation process.
- [What is a powertransformer?](https://protrafo.com/faq/what-is-a-powertransformer/): 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.
- [What is the function of a transformer?](https://protrafo.com/faq/whats-the-function-of-a-transformer/): The primary function of a transformer is to change voltage levels in an electrical system. It increases (steps up) or decreases (steps down) voltage to enable efficient power transmission and safe distribution. This voltage conversion minimizes energy loss over long distances and ensures compatibility with different types of electrical equipment.
- [What is the preferred type of transformer for indoor use?](https://protrafo.com/faq/what-is-the-preferred-type-of-transformer-for-indoor-use/): 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, and industrial facilities. Unlike oil-filled transformers, they do not require special containment for leaks or ventilation for flammable gases.
- [What is the purpose of oil inside a transformer?](https://protrafo.com/faq/what-is-the-purpose-of-oil-inside-a-transformer/): 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.
- [What are the main key differences between a dry-type transformer and a oil filled transformer?](https://protrafo.com/faq/what-are-the-main-key-differences-between-a-dry-type-transformer-and-a-oil-filled-transformer/): 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, offering higher efficiency, better overload capacity, and longer lifespan. They are typically used outdoors or in high-power applications. Each type is chosen based on the specific safety, performance, and environmental requirements of the installation.
- [What is the expected lifespan of a transformer?](https://protrafo.com/faq/what-is-the-expected-lifespan-of-a-transformer/): 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.
- [What kind of maintenance does a cast resin type require?](https://protrafo.com/faq/what-kind-of-maintenance-does-a-cast-resin-type-require/): 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.
- [Why are most oil transformers colored in green?](https://protrafo.com/faq/why-are-most-oil-transformers-colored-in-green/): Green is commonly used for oil-filled transformers as it blends well with outdoor environments and provides a neutral, non-reflective finish. Additionally, the coating protects the transformer against corrosion and harsh weather conditions. The color has no impact on performance but contributes to visual integration and durability.
- [Unveiling the Importance of Hermetically Sealing Transformers](https://protrafo.com/faq/unveiling-the-importance-of-hermetically-sealing-transformers/): Hermetically sealed transformers are fully enclosed to prevent contact between the insulating oil and external air or moisture. This design minimizes oxidation, extends oil and insulation lifespan, and reduces maintenance needs. Hermetically sealed units are ideal for environments with high humidity or aggressive atmospheres, ensuring long-term reliability and reduced risk of internal contamination.
- [How efficient should a TIER2 Ecodesign transformer be?](https://protrafo.com/faq/how-efficient-should-a-tier2-ecodesign-transformer-be/): Tier 2 Ecodesign transformers, as defined by EU regulation (EU) 2019/1783, must meet strict energy efficiency limits for both load and no-load losses. These limits vary by transformer type and power rating. For example, a 1,000 kVA oil-immersed transformer must not exceed 1,250 W no-load losses and 10,700 W load losses. Protrafo supplies transformers compliant with EN 50588-1 and IEC TS 60076-20 (Loss Level 2), ensuring high efficiency and reduced environmental impact.
- [What defines the new TIER2 ecodesign norm for transformers?](https://protrafo.com/faq/what-defines-the-new-tier2-ecodesign-norm-for-transformers/): The Tier 2 Ecodesign norm, effective from July 1, 2021, sets stricter limits on energy losses for power transformers within the EU. It focuses on reducing both no-load and load losses to improve overall efficiency and lower environmental impact. The regulation applies to distribution and power transformers from 1 kVA up to 3150 kVA and beyond, promoting the use of optimized core materials and advanced design standards. Compliance is mandatory for new installations within the European market.
- [How to transport a transformer?](https://protrafo.com/faq/how-to-transport-a-transformer/): Transporting a transformer requires careful planning and handling to ensure safety and prevent damage. Depending on the size and type, transformers can be shipped fully assembled or in parts. Key steps include securing the unit on a reinforced pallet or skid, protecting components with transport covers, and using specialized lifting points. For larger units, Protrafo provides project-specific logistics, including route planning, crane coordination, and on-site delivery support across Europe.
- [How long does it take to produce an oil filled transformer?](https://protrafo.com/faq/how-long-does-it-take-to-produce-an-oil-filled-transformer/): Production time for an oil-filled transformer typically ranges from 6 to 12 weeks, depending on the specifications, capacity, and required certifications. For urgent projects, Protrafo can deliver from stock or offer accelerated production in coordination with our manufacturing partners. Custom-built units with special features may require additional lead time.
- [When do i need a transformer?](https://protrafo.com/faq/when-do-i-need-a-transformer/): You need a transformer when there is a need to adjust voltage levels between different parts of an electrical system. Common situations include connecting industrial equipment to the grid, distributing power over long distances, or supplying energy to buildings with specific voltage requirements. Transformers are essential in both utility and private installations to ensure safe, efficient, and reliable power delivery.
- [How does the oil-filled transformer technology enhance power distribution?](https://protrafo.com/faq/how-does-the-oil-filled-transformer-technology-enhance-power-distribution/): Our oil-filled transformers use advanced oil cooling technology to efficiently dissipate heat and reduce energy losses. This ensures stable voltage regulation, improved power quality, and minimal downtime, making them a cost-effective solution for your power distribution needs.
- [What is an oil-filled distribution transformer and why should I choose one?](https://protrafo.com/faq/what-is-an-oil-filled-distribution-transformer-and-why-should-i-choose-one/): An oil-filled distribution transformer is a high-performance electrical device that uses insulating oil to cool and insulate its windings. This design provides excellent heat dissipation and reliability, making it the ideal choice for industrial and utility applications where efficiency and long-term performance are critical.
- [What is a distribution transformer?](https://protrafo.com/faq/what-is-a-distribution-transformer/): Distribution Transformer: An Essential Component of Power Distribution Systems

## inventories
- [630 kVA 10.75/0,42 kV – 21616811](https://protrafo.com/inventory/630-kva-10-75-042-kv-21616811/)
- [1.000 kVA 10,6/0,42 kV – 202402252](https://protrafo.com/inventory/1-000-kva-106-042-kv-202402252/)
- [1.000 kVA 10,6/0,42 kV – 202402251](https://protrafo.com/inventory/1-000-kva-106-042-kv-202402251/)
- [1.000 kVA 10,6/0,42 kV – 202402250](https://protrafo.com/inventory/1-000-kva-106-042-kv-202402250/)
- [160 kVA 10,6/0,4 kV – 202410010](https://protrafo.com/inventory/160-kva-106-04-kv-202410010/)

## Knowledge base
- [Protrafo Signs Multi-Year Framework Agreement with M2 Energie B.V.](https://protrafo.com/knowledge-base/protrafo-signs-framework-with-m2-energie/)
- [EV Charging Infrastructure and Transformers](https://protrafo.com/knowledge-base/ev-charging-infrastructure-and-transformers/)
- [Transformers in Renewable Energy: Wind and Solar Integration](https://protrafo.com/knowledge-base/transformers-in-renewable-energy-wind-and-solar-integration/)
- [From Power Plant to Plug: The Role of Transformers in Energy Distribution](https://protrafo.com/knowledge-base/from-power-plant-to-plug-the-role-of-transformers-in-energy-distribution/)
- [Unveiling the Importance of Hermetically Sealing Transformers](https://protrafo.com/knowledge-base/unveiling-the-importance-of-hermetically-sealing-transformers/)
- [What is the preferred type of transformer for indoor use?](https://protrafo.com/knowledge-base/what-is-the-preferred-type-of-transformer-for-indoor-use/)
- [What is the purpose of oil inside a transformer?](https://protrafo.com/knowledge-base/what-is-the-purpose-of-oil-inside-a-transformer/)
- [What are the main key differences between a dry-type transformer and a oil filled transformer?](https://protrafo.com/knowledge-base/what-are-the-main-key-differences-between-a-dry-type-transformer-and-a-oil-filled-transformer/)
- [What is the expected lifespan of a transformer?](https://protrafo.com/knowledge-base/what-is-the-expected-lifespan-of-a-transformer/)
- [What kind of maintenance does a cast resin type require?](https://protrafo.com/knowledge-base/what-kind-of-maintenance-does-a-cast-resin-type-require/)
- [Why are most oil transformers colored in green?](https://protrafo.com/knowledge-base/why-are-most-oil-transformers-colored-in-green/)
- [How efficient should a TIER2 Ecodesign transformer be?](https://protrafo.com/knowledge-base/how-efficient-should-a-tier2-ecodesign-transformer-be/)
- [How to transport a transformer?](https://protrafo.com/knowledge-base/how-to-transport-a-transformer/)
- [What is a distribution transformer?](https://protrafo.com/knowledge-base/what-is-a-distribution-transformer/)
- [How long does it take to produce an oil filled transformer?](https://protrafo.com/knowledge-base/how-long-does-it-take-to-produce-an-oil-filled-transformer/)
- [What defines the new TIER2 ecodesign norm for transformers?](https://protrafo.com/knowledge-base/what-defines-the-new-tier2-ecodesign-norm-for-transformers/)

## Projects
- [Protrafo expands its fleet with fully electric VW ID. Buzz Cargo vehicles](https://protrafo.com/project/protrafo-expands-its-fleet-with-fully-electric-vw-id-buzz-cargo-vehicles/)
- [Vattenfall Zonnepark 20 kV / 3.15 MVA, 8 units, 45 MW grid connection.](https://protrafo.com/project/vattenfall-zonnepark-20-kv-3-15-mva-8-units-45-mw-grid-connection/)
- [Project Transport in Action](https://protrafo.com/project/project-transport-in-action/)
- [Powering Clean Heat: 16 MVA Transformer for E-Boiler Project in Finland](https://protrafo.com/project/16-mva/)
- [Transformer Repair at Solar Park – Sleen, The Netherlands](https://protrafo.com/project/repair-sleen/)
- [Installation 10 MVA Power Transformer Finland](https://protrafo.com/project/10-mva-finland/)
- [Transformer Recovery and Repair: Restoring Power to a Solar Park After a Short Circuit](https://protrafo.com/project/transformer-recovery-and-repair-restoring-power-to-a-solar-park-after-a-short-circuit/)
- [Supply of 10 x 2.000 kVA Transformers for Substation Builder Partner in the Netherlands](https://protrafo.com/project/supply-of-10-x-2-000-kva-transformers-for-substation-builder-partner-in-the-netherlands/)

## Services
- [Rental and Storage Services](https://protrafo.com/service/transformer-rental/): Voorbeeld tekst, graag vervangen. At Protrafo, we understand the critical role that distribution and power transformers play in energy networks. Any unplanned downtime or performance issues can lead to costly disruptions. That’s why we developed Protrafo Insights, an advanced monitoring service designed to keep your transformers performing at their peak.
- [Transformer  Commissioning](https://protrafo.com/service/transformer-installation-and-commissioning/)
- [Revision, Retrofit and Testing](https://protrafo.com/service/transformer-revision-and-retrofit/)
- [Maintenance, oil samples and service](https://protrafo.com/service/inspections-repairs-and-service/)
- [Protrafo Consultancy](https://protrafo.com/service/protrafo-insights/): At Protrafo, we understand the critical role that distribution and power transformers play in energy networks. Any unplanned downtime or performance issues can lead to costly disruptions. That’s why we developed Protrafo Insights, an advanced monitoring service designed to keep your transformers performing at their peak.