The PSM units from N4L are very suitable for testing transformers manually or automatically (using a PC). They have the measurement capacity (DFT and true rms, from 10mHz to 2.4MHz) to perform the most commonly required transformer tests:

  • Turns Ratio
  • Primary inductance and resistance
  • Leakage inductance
  • Interwinding capacitance
  • Magnetising current
  • Insertion loss
  • Return loss
  • Harmonics
  • THD
  • Longitudinal Balance


Most tests require a simple circuit, such as resistors to be mounted in a test rig. Above mentioned tests can be found in the application note. For more information click on view application note.

Bekijk application note


Arnold Memelink

Arnold Memelink


"The ABB Power Grids Jumet organisation is an innovative development and production facility of ABB that manufactures active filters and battery energy storage systems to support a stable grid. To test these systems we have acquired two Cinergia GE/EL +120kVA eplus units capable of doing grid emulation (AC + DC), operating as an electronic load (AC +DC) and being a battery emulator. We have experienced very good support from TTMS in obtaining these two Cinergia units. This included organising an on-site demonstration and supplying loan systems prior to the delivery of our final systems. This way we could start testing as early as possible. TTMS also organised training for the operators from the original manufacturer. This support allowed us to introduce the first battery energy storage systems even prior to the full delivery of the Cinergia systems."

University of Luxembourg

Sasan Rafii-Tabrizi

University of Luxembourg

“At the Energy and Environment department of the Faculty of Science, Technology and Medicine (FSTM) of the University of Luxembourg we do have different research projects related to green energy contributing to the development of eco-cities. As a long-standing partner of our research unit, TT&MS has proven that they are able to answer even the most complex questions in a professional manner. They have shown that they are always up to date with the latest technology and do not spare any effort to look at the application and even the situation on site. The exchange of ideas was always very pleasant and took place quickly. We look forward to further years of fruitful cooperation.”


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