We test electrical equipment, cables, safety equipment, chemical analysis of transformer oil and chromatographic analysis of oil for dissolved gases (hydrogen, methane, acetylene, ethylene, ethane, carbon monoxide, carbon dioxide, oxygen, nitrogen).

Transformer oil testing:

• Chemical analysis of transformer oil:

  • Determination of flash point in a closed crucible;

  • Determination of acid value;

  • Determination of the dielectric loss angle tgϭ of transformer oil;

  • determination of mechanical impurities.

  • Determining the breakdown voltage;

  • Determining the amount of water;

• Chromatographic analysis of oil for dissolved gases (hydrogen, methane, acetylene, ethylene, ethane, carbon monoxide, carbon dioxide, oxygen, nitrogen).

The High Voltage Laboratory performs:

• Testing, measurement, monitoring of power, voltage and current transformers up to 400 kV;

• Metrological verification of current, voltage and combined measuring transformers;

• 0,4-330 kV electrical equipment tests, measurements, thermal imaging;

• Electrical tests and measurements for AC, DC motors;

• Measurements of capacitance (C), dielectric loss (tg delta) and insulation resistance of 35-110-330 kV inputs;

• Diagnostics of surge arresters;

• Checks on internal resistances, voltages and test discharges of batteries;

• Testing of individual and collective safety equipment;

• 0.4-110 kV cable measurements, elevated voltage tests;

• Fault location settings for 0.4-35 kV cables;

• Ground loop, loop phase-zero measurements;

• Measurements of earthing devices and transient resistances.