High voltage laboratory

Research topics

  • AC withstands voltage tests up to 300 kV, max. current 1 A,
  • DC withstands voltage tests up to 140 kV, max. current 11 mA,
  • lightning impulse voltage tests 1.2/50 μs full and chopped waves up to 935 kV,
  • switching impulse voltage tests 250/2500 μs full and chopped waves up to 750 kV,
  • surge arresters testing by current impulse 8/20 μs up to 25 kA,
  • partial discharge measurement with test voltage up to 300 kV and PD level ≤ 3 pC,
  • research and development of insulating systems of power cables, overhead lines, transformers, switches apparatus and switchgears.


OT 248 T Digital Operating Terminal

  • max. charging voltage and primary current measurement of AC test system,
  • setting of automatic sequences of withstands voltage tests and visualization and recording of tests parameters.

HiAS 743-2 Digital Impulse Analyzing System

  • 2 measuring channels with 120 MS/s sampling rate and 12 bit resolution for impulse voltages and currents measurement,
  • automatic evaluation of all common impulse shapes and their parameters with total measurement uncertainty 1.5% in voltage and current measuring and 2.5% in time measuring.

DDX8003 Digital PD Detector with Pulse Discrimination

  • PD measurement with resolution 9 bit, PD phase resolution 0.35 degree, time resolution 12.5 ns,
  • pulse discrimination of interference noise,
  • PD site location for power cables.

Head of laboratory

Jaroslava Orsagova
Technicka 3082/12, 616 00 Brno, Czech Republic
Email: orsagova@vut.cz
Phone: +420 541 146 224