The size of transformers can be customized according to the Customer’s needs. The most suitable materials used allow to achieve high performance levels and limited losses.
The optimized calculation process and the use of top-quality materials allow to meet the requirements of technical specifications.


These transformers are specifically designed and manufactured to guarantee the load protection. Isolation transformers usually provide a unit transformation ratio (e.g. 400/400V) and are used to uncouple the load from the power supply grid, as the primary and secondary windings are galvanically isolated.

The typical sectors of application are telecommunication systems, data centre power supply systems, trafoless UPS power supply, by-pass line protection, public building systems.



Isolation transformers are always equipped with an electrostatic screen between the primary and secondary windings.

The windings are made in a delta/star or delta/zig-zag configuration (with star center available) to eliminate the third and multiple-ofthree harmonics.

Isolation transformers perform various functions and, in particular, in data center power supply systems, they can be used for the following purposes:

  • Within a UPS, to act as an integral part of power conversion circuits.
  • To create a locally grounded stable neutral point.
  • Inside distribution units to reduce harmonic currents.
  • If equipped with sockets, to allow voltage adjustment to comply with load requirements.
  • To eliminate ground loops with multiple generators or network sources.

Ortea Next manufactures a range of standard isolating transformers having K factor 4, 13 and 20, but we can meet any specific need of the Customer.


These isolation transformers are specifically designed to cope with the high level of harmonic distortion generated by non-linear loads. Typical non-linear loads are computers, variable speed drives, inverters, welding machines. The harmonics generated result in a higher effective value of current and therefore in an increase in Joule losses.

In order to ensure compliance with the temperature limits defined by the thermal class, the design of the transformer must take account of these harmonics. The degree of influence of harmonic distortion is indicated by the K factor: the higher the K value, the higher the harmonic content that the transformer must withstand without damage.


These transformers are used for AC/DC conversion and DC/AC rectification units that are typical of uninterruptible power supplies (UPS).

These transformers are highly customized and standard types cannot be defined, as their design is linked to that of the machine in which they are to be installed. Both the electrical parameters and the mechanical characteristics meet precise specifications drawn up by the UPS manufacturer.

Close cooperation is therefore essential for the development of the most suitable solution.

Thanks to its decade-long experience, Ortea Next designs and manufactures transformers that are suitable for any type of UPS system.

Partnerships with the world’s leading manufacturers provide evidence of the high degree of reliability achieved.


These transformers are used to ensure adequate separation and protection between the photovoltaic system and the electricity grid. Their main functions:

  • Isolation and safety: they create an electrical barrier between the photovoltaic system and the grid, reducing the risk of damage or problems to the grid due to faults or disturbances in the photovoltaic system.
  • Voltage adaptation: they can adapt the voltage generated by the solar panels to make it compatible with the local grid voltage, allowing the safe injection of energy into the grid.
  • Ground fault protection: they help prevent the passage of ground fault currents from the grid to the DC part of the photovoltaic system, improving operator safety and reducing the risk of fire.
  • Efficiency improvement: they can improve the efficiency of the photovoltaic system, ensuring that the energy generated is transmitted to the grid with minimal losses, resulting in improved system economics.
  • Regulatory compliance: they are often needed to meet regulatory and safety requirements imposed by local and national authorities for the safe integration of photovoltaic systems into the grid.


Due to the importance and peculiarities of electrical systems used in the medical sector, it is crucial to have highly reliable transformers, both from an operational and a safety point of view (IEC 61558-2-15 standard).

The medical isolation transformer is an isolated power supply used in medical electrical IT systems (isolated from earth) that allows the isolation to be monitored and minimises the risk of failure by maintaining operational continuity of the power supply.

The use of the isolation transformer in these medical contexts helps prevent short circuits, electrical discharges, interference and other issues that could jeopardise patient safety and equipment integrity.

Below are some examples of medical equipment that benefit from the use of isolation transformers:

  • Imaging equipment
  • Surgical equipment
  • Monitoring equipment
  • Therapy equipment
  • Diagnostic equipment.


They are used for special industrial applications mainly in galvanic plants (chromiumplating, zinc-coating, etc.)
The rectifier converts alternating current to direct current.
Again, the transformer is developed specifically for the rectifier for which it is intended.
The conversion unit can have different configurations (three-phase bridge, six-phase with or without interphase coil, twelve-phase, etc.) and each one requires the sizing of a dedicated transformer.
The type of use requires high secondary currents in the thousands of amperes.
The know-how of LETEAC’s design engineers leads to the best possible engineering and development of output bars, that represent one of the most critical parts.


Transformers are often used just to adapt the voltage coming from the grid to the voltage required by the system or the machinery to be power supplied.

In this case, each transformer is intended for the specific use.

Thanks to their professional expertise, LETEACt’s design engineers process user’s data to find the best solution in terms of
efficiency, cost-effectiveness and performance.

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