Testing of power system protection

Three-phase voltage generator GU3F


Single phase supply voltage 50 Hz, after reducing is shifted by angle 120°, for three phase star making. After amplification, the voltages are fed to output by step-up transformer.
Generator has two-stage voltage control – concurrent for selected phases and separate for each single phase with possibility of elimination given phase.


Voltage generator is assigned for testing devices supplied by three-phase voltages. It enables simulation of system asymmetry and fault/decay of arbitrary phase voltage. It is used e.g. for protection systems checking.


Max. output voltage 120 or 300 V
Output power
40 VA / phase
Allowable uncertainty ±(1 % of reading + 1 digit)
Enclosure protection IP 67
Power supply
230 V, 50 Hz
490 x 390 x 190 mm
Weight 14 kg


All questions should be directed to:

  • Dariusz Janecki MSc Eng., , phone number: +48 32 237 66 73,
  • Józef Arnold MSc Eng., , phone number: +48 32 237 66 73.