Transformer Test System

For on-site testing

The on-site test system for power transformers is used to perform the induced AC voltage test, the measurement of no-load loss and current, the measurement of short-circuit impedance and load loss, the temperature-rise test, and special tests according to the international standard IEC 60076. The test system is based on the state-of-the-art frequency converter technology and carries out tests generating a precise voltage waveform with a total harmonic distortion (THD) < 5% and a partial discharge (PD) noise level < 20 pC. The test system is maintenance-free.

The modular design and the newest digital control technology allow two or more test systems to be connected in parallel making it possible to test even largest power transformers in the GVA range. Generally the test system can be set up on-site within an hour. There is no need for additional “lifting” or “assembly.”


  • Induced AC voltage test
  • Measurement of no-load loss and current
  • Measurement of short-circuit impedance and load loss
  • Temperature-rise test
  • Special tests


  • Freely adjustable frequency 40 Hz to 200 Hz
  • THD < 5 %
  • PD noise level < 20 pC
  • Parallel operation allows even largest power transformers in the GVA range
  • Easy and fast test setup
  • Maintenance-free
  • Low investment and life-cycle costs

Technical parameters/system types