High Voltage Laboratory operates within KONČAR – Electrical Engineering Institute as an integral part of the Laboratory center. 
The main activities of the Laboratory are developmental, research, and commercial tests of electro-energy equipment. In addition to the standard defined test methods, the Laboratory applies its methods developed through experience. 

Technical capabilities

  • Impulse voltages up to 2400 kV
  • Front-chopped linearly rising impulse voltage
  • AC voltage up to 1000 kV
  • Tests with AC voltage consisting of fundamental voltage and harmonic voltages with amplitudes in the range 5-15 %
  • DC voltage up to 300 kV
  • Wet tests
  • Measurement of radio interference voltage
  • Measurement of partial discharges
  • Accuracy class measurement of instrument transformers
  • Temperature rise tests
  • Thermal stability
  • Capacitance and dielectric losses measurement
  • Calibration of electrical field strength meters
  • Calibration of high voltage measurement systems
  • Calibration of PD calibrators
  • Acoustic emission testing of power transformers on site

Equipment tested

  • High voltage measuring systems and test equipment
  • Instrument transformers
  • Power transformers
  • BushingsDisconnectors
  • Circuit breakers
  • High-voltage switchgear and controlgear
  • Power cables
  • Fittings for overhead lines
  • Busbars
  • Rotating electrical machines winding bars and coils
  • All types of insulators
  • Capacitors
  • Partial discharge calibrators
  • Electric field strength meters
  • Tools and equipment for live working

BROCHURE: High Voltage Laboratory BROCHURE: Calibration of HV measuring systems and PD calibrators

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