ETD Transformers

About Us

Our experience in manufacturing and supplying power transformers and other world-renowned products dates back to 1923. Our company's current production program includes single-phase and three-phase power transformers, autotransformers, furnace transformers, traction chokes for use in the railway industry, as well as special reactors.

We build on the legacy of Škoda plants. ETD transformers are designed, manufactured, tested and delivered to customers worldwide. We combine tradition, modern design and modern product technology. All transformers are delivered to their destination and then installed and tested. We comply with international standards and technical specifications.

Our plant also includes an Electrical Testing Laboratory, which offers a wide range of accredited and non-accredited tests.

The unique combination of reliability of our equipment, industry expertise, speed and quality of service provided are at the core of our business success worldwide.

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Average annual capacity
2 400 – 2 800 MVA


Production space
The total area of the plant is 25,400 m2 - of which 11,600 m2 is used as a production area, 8,500 m2 is occupied by warehouse space, 10,500 m2 is used by logistics, and the rest by administration. Additional space is available in other buildings owned by ETD if needed. These premises can also be rented, if you are interested, please make an inquiry.


Office space
Another 5,000 m2 are used as office space.


Number of employees
The total number of employees is 176, of which 93 are blue-collar workers and 79 are white-collar employees. 41 experienced electrical engineers work in our team.

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Most of our clients come from abroad. 65% of our production is exported. At the same time, we are a market leader of domestic production.


As a former Škoda company, we are proud of the tradition of manufacturing and supplying power transformers and other world-renowned products. This tradition dates back to 1923. Our factory is located in the original brick premises of the Škoda factories. This space was founded in the years 1918 – 1919 in the Doudlevce district of Pilsen near Prague.

Since 2004, ETD TRANSFORMÁTORY has been a proud member of the International BEZ Group holding, based in Bratislava, Slovak Republic. International BEZ Group is a strong transformer manufacturing company in Central Europe, combining the expertise of several leading transformer manufacturers 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, ISO 45001:2018, EN ISO 3834-2 standards.

The company is a member of Association of High-voltage Laboratories.

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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