3 phase transformers

Discover the perfect 3-phase transformer for industrial and maritime projects

Quality and expertise for your electrotechnical projects

Welcome to detransformatorspecialist.nl.

You are facing the technical challenge of designing a robust, safe, and highly reliable power supply for your industrial installation, maritime project, or sustainable energy solution.

We understand better than anyone that the correct stable voltage is directly linked to the continuity and safety of your daily business processes.

Through our webshop, we offer you direct online access to a highly diverse range of high-quality electrotechnical components.

We exclusively distribute products sourced from renowned European manufacturers.

This allows us to guarantee excellent build quality, strict compliance with stringent European safety standards, and extremely fast delivery directly from the production facility.

Naturally, you are looking for certainty and in-depth technical expertise for your project.

Our experienced product specialists are available daily to provide you with appropriate, factual, and safe advice regarding the most complex transformer issues.

We unburden you throughout the entire process, starting from the initial capacity calculation to the final delivery of your 3-phase transformer to your factory floor or shipyard.

Operation and electrotechnical principles

Customers from the panel building and machine building sectors approach us daily with technical questions regarding their power supply.

This heavy-duty electrotechnical equipment transforms incoming AC voltage to a higher or lower level to safely power heavy machinery and industrial installations, without altering the grid frequency.

The device utilizes three separate copper or aluminum coils that are magnetically coupled around an iron core.

This sophisticated system creates a powerful rotating magnetic field.

Within the industrial sector, this results in significantly higher efficiency and stability when driving heavy electric motors, pumps, and compressors.

Clarity is often lacking regarding the exact difference between a 1-phase and a 3-phase transformer.

A single-phase model operates with only one AC voltage, typically 230V in Europe, and is primarily suitable for lighter applications such as medical equipment, control current, or domestic systems.

A three-phase system, usually 400V, continuously delivers massive power via three overlapping voltage waves that are shifted exactly 120 degrees relative to each other.

This mechanism results in a more uniform load on the electricity grid, substantially lower copper losses in long cabling, and the ability to carry larger loads.

For demanding environments in the offshore or heavy industry, the decision for a 3-phase transformer is the only correct technical choice.

Maritime applications and galvanic isolation

On board modern vessels, costly problems regularly arise due to galvanic corrosion when the power supply is connected to the harbor grid via a standard non-insulated cable.

The effective and definitive solution for this is a 3-phase shore power transformer for ships and yachts.

We advise maritime professionals, shipping companies, and yacht owners in almost all cases to install a high-quality isolation transformer.

This equipment completely and galvanically separates the local onboard grid from the fixed shore power grid.

Due to this physical separation in the copper or aluminum windings, harmful earth leakage currents have no chance to affect the metal hull, propeller, or zinc anodes of your ship.

The robust 3-phase transformer also absorbs unexpected voltage spikes and grid pollution, which unfortunately occur frequently in marinas with varying heavy loads from other moored vessels.

For shipyards and specialized maritime installers, we supply these units upon request in special vibration-resistant and moisture-proof enclosures, where IP44 or higher is part of the standard options.

This is how we guarantee safety on the water under all weather conditions.

Supporting the sustainable energy transition

The current accelerated energy transition is forcing numerous companies to significantly upgrade and secure their existing electrical infrastructure.

We receive weekly questions from installers: "Which 3-phase transformer is needed for a charging station?" When installing multiple powerful fast chargers for electric vehicles, such as 11kW or 22kW units, a significant imbalance in the local grid often occurs.

There is also often a compelling need for a specifically clean star point to allow earth leakage protection in the vehicles to function correctly and safely without unwanted tripping.

We see similar technical issues arising during the construction of large-scale commercial solar parks.

Many project developers want to purchase a reliable 3-phase transformer for solar panel inverters to combat grid congestion or voltage swelling.

In certain cases, heavy-duty PV inverters require a specific grid voltage, such as 480V, 690V, or 800V, which deviates significantly from the standard 400V grid connection in a regular commercial building.

We analyze your circuit diagrams and advise exactly which equipment is required to feed the generated solar energy back into the public grid safely, continuously, and highly efficiently, without your expensive inverters failing due to excessive harmonic grid pollution.

Technical calculation aid for power determination

The most frequently asked technical question our engineering department receives is: "How can I calculate the power in VA / kVA for a 3-phase transformer?" To determine the correct capacity in kilo Volt-Amperes, the following universal mathematical formula is used in electrical engineering:

Practical example:

You own an industrial CNC machine running on 400 Volts that draws a maximum of 35 Amps at full load.

The calculation for the required 3-phase transformer then becomes:

We advise observing a minimum safety margin of 20% for inrush currents.

In this case, it is best to choose a model of at least 30 kVA.

Investment overview and price transparency

Our customers greatly value openness and transparency in acquisition costs.

Buyers therefore search online specifically for the price of a 3-phase isolation transformer 400V to 230V.

The final investment depends on the kVA rating, the IP protection degree, and additions such as integrated fuses and CEE sockets.

A standard, energy-efficient EREA model of 10 kVA in an IP23 enclosure can typically be ordered via our webshop for between one thousand and fifteen hundred euros, excluding VAT.

However, if your application requires a fully jet-proof IP65 enclosure for aggressive maritime environments, the price of the 3-phase transformer will logically be higher due to more complex heat dissipation.

Engineering and customer-specific solutions

Sometimes a standard product does not meet the requirements of your engineering department.

You then ask yourself: "Where can I order a custom 3-phase transformer?".

At detransformatorspecialist.nl, you have come to the right place for customer-specific configurations.

Our technicians engineer robust models with complex vector groups (such as Dyn11, Ynd, or Dd0), deviating secondary voltages, or additional insulation values for critical environments.

Since every custom project is unique in terms of copper connections and core material, we provide the price for a specific 3-phase transformer exclusively upon request.

A custom solution from our European factories is often more competitive than the costly retrofitting of a standard model.

Responsible logistics and fast delivery

We offer structurally fast-delivery 3-phase transformers of European manufacture.

By keeping production within Europe, we avoid polluting sea transport from Asia.

This ensures your project never faces unnecessary delays due to logistical bottlenecks on the world's oceans.

We are committed to the environmentally conscious shipping of every industrial 3-phase transformer.

We achieve this through recyclable packaging and efficient transport routes.

This policy aligns seamlessly with the strict ESG certifications in the offshore and energy sectors.

Why market leaders choose us

You are looking for a specialist in 3-phase transformers for the industry.

Why choose detransformatorspecialist.nl?

While many suppliers employ opaque quotation processes, we offer direct transparency.

Prices can be viewed directly through our webshop without any barriers.

In addition, high-quality technical assistance in choosing the right 3-phase transformer is included as standard.

Our engineers review your schematics to ensure the most efficient solution for the heavy process industry.

Answers to frequently asked practical questions

• Can I safely place the 3-phase transformer outdoors?

  Yes, provided you choose the correct IP rating. We recommend a minimum of IP44 under a shelter and IP65 for direct exposure to precipitation.

• Do you offer solutions for hospitals?

  Certainly. We supply certified medical isolation transformers that comply with the NEN-EN-IEC 61558-2-15 standard.

• How does temperature affect the performance of a 3-phase transformer?

  Standard models are designed for a maximum of 40°C. For warmer areas, our engineers calculate the required overcapacity (derating).

• Do you provide support with the connection?

  We include detailed diagrams. For questions regarding vector groups or the star point, we provide immediate telephone assistance to your installer.

Take the step towards a safe power supply today

Your project requires a safe and failure-free power supply.

We invite you to view our range of 3-phase transformers in our webshop.

Easily filter by voltage, kVA rating, and IP class.

Do you require specialized advice for a custom-made 3-phase transformer?

Contact our engineering department directly for a non-binding, competitive quote.