The testing process made by TRAMAG

– What you can rely on

Insights into the transformer and choke production of a leading specialist

TRAMAG has stood for high-quality, reliable winding goods for almost 100 years. That is why all our products are subjected to 100% routine testing either in our German or in our Czech plant before they leave the factory. But also the upstream manufacturing process is subject to several defined quality checks at all stages of the value chain.

TRAMAG quality guidelines

The tests are generally based on our guiding standard, DIN EN61558 for transformers and chokes in the low-voltage range. This specifies exactly which type and routine tests are prescribed for the respective winding material.

Process of the inspection

In order to guarantee a flawless and continuous quality inspection for each product, our employees follow the specified process description.
There, all responsibilities, processes as well as the scope of testing are specified in detail. If necessary, additional special tests are included that have been agreed with the customer in advance.

Our products are 100% tested!

Final inspection at TRAMAG

Quality assurance of transformers and chokes.

There are specific test schedules for transformers and chokes, based on the standard and the quality guidelines.

Piece test sequence of transformers and chokes

  • Protective conductor test
  • High-voltage test with withstand AC voltage
  • Open circuit / transformation test (transformers)
  • Inductance test with LCR measuring bridge (chokes)
  • Resistance test (chokes)
  • Dimensional test
  • Visual inspection

Additional testing services at TRAMAG

Further, one-off test steps concern weight measurement, short-circuit measurement and, especially for chokes, inductance measurement with alternating current.

In connection with specially required type tests or special tests – mainly carried out with initial samples – the noise measurement and the heating test are to be mentioned as relevant above all.

You would like to learn more about our production and our products?

Contact us now


Always up to date in transformer technology

23. March 2023

TRAMAG Branch Chokes – The perfect fit for Multilevel Converter Systems

Industrial drives systems require powerful converters with maximum flexibility and high availability. In addition, they must be suitable for controlling almost any type of motor and the voltage-signal must be mains-friendly as well as motor-friendly on the output side.

15. March 2023

TRAMAG Special Transformers with the right power for Copper Wire Production

TRAMAG Special Transformers with the right power for Copper Wire Production Highlight of the week Machine and plant construction is the primary domain for the use of our TRAMAG transformers. […]

8. March 2023

TRAMAG Low Harmonic Filter (LHF) Chokes for trouble-free operation of Island-Power-Supplies

TRAMAG Low Harmonic Filter (LHF) Chokes for trouble-free operation of Island-Power-Supplies Highlight of the week Separated from the public interconnected power grids operated by large energy supply companies, technologically complex […]

28. February 2023

TRAMAG transformers with multiple secondary system for medical devices in use

In hardly any other industry are the quality requirements for safe voltage supply, electrical safety and reliable functionality greater than in medical technology.

Transformatoren für Medizintechnik
23. February 2023

Sinusoidal Filters for drive systems with special requirements

TRAMAG chokes and filters are used in drives systems whose core component is a frequency converter that controls one or more motors of a machine or system. Between frequency converters and motors, caused by long cable lengths, undesirable voltage surges can occur at the motor terminals and damaging, parasitic losses can occur in the motor.


Stay tuned!
English content coming soon!

Transformatoren Spezialist Transformatoren Spezialist