ETD Transformatory

Who we are

Our experience in the production of distribution, power and other various types of world class transformers reaches back to the year 1923. Current products include power transformers (single and three phased regulating and non regulating), auto transformers, furnace transformers, traction transformers and chokes for use in the rail industry as well as special reactors.

In the proud engineering legacy of Skoda, ETD transformers are designed, manufactured and tested and then transported to customers world wide by combining tradition, modern design and manufacturing principles. All transformers are delivered at site, installed, tested and commissioned meeting EU and other international and site specific norms and specifications.

Part of our factory is Electrical Testing Laboratory, which offers a wide range of accredited and non-accredited tests.

A unique blend of reliable equipment, industrial expertise, timely and quality services create the milestone of our global success.

Facts and Figures
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Annual production capacity
2 400 - 2 800 MVA


Production space
The overall floor space of 25 400m² is used up by production (11 600m²), storage (8 500m²) and logistics (10 500m²). The rest is used for offices. Additional space is available in our older storage halls if needed. Unused storage space in Pilsen can currently be rented, please ask for a quotation.výrobní


Office space
Additional 5 000 m² are used as office space.


Employee count
Out of the 168 employees, 89 are blue collar and 78 white collar. Our team features 41 experienced electro-technical engineers.

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Most of our clients are situated abroad. Over 65% of our production is exported. We are a national market leader and a significant regional producer.

Our history

As the former Skoda transformer factory, this plant has a proud history of producing distribution, power and other various types of world class transformers dating back to 1923. The factory is located on the old Skoda brick factory site developed in 1918 – 1919 in Doudlevce, Pilsen close to Prague.

The production started in 1921 and included the electrotechnical assembly for engineering supplies, components for heavy-current electrotechnical engineering, ener­gy and electric traction units. The first transformer has been produced in 1923 and first traction transformer has been succesfully produced in 1965. We have decided to abandon the wide range of products and instead focus only on the production of transformers, choke coils and reactors.

Since 2004 ETD TRANSFORMATORY is a proud member of the International BEZ Group. The privately owned International BEZ Group, based in Bratislava, the Slovak Republic is a transformer power house in central Europe. The holding company combines a significant amount of transformer knowledge and expertise of some of the most respected and renowned European producers and service companies of small, medium and large power transformers in one group.

Quality and certificates

The company's top priorities are the quality of products and services, environmental protection, occupational health and safety, customer satisfaction, owners, employees, suppliers and society as a whole.

The company has implemented an integrated management system with certification according to EN ISO 9001, EN ISO 14001, BS OHSAS 18001, EN ISO 3834-2 standards.

ETD TRANSFORMATORY a.s. is a traditional major manufacturer and supplier of quality and reliable power transformers and other products and services in the field of electrical non-rotating machines for energy, industry and railway transport.

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