Electro-Laboratory

cover Electro-Laboratory

The Electro-Laboratory Unit of Energoimport-Export has modern equipment for carrying out a wide range of electrical measurements and tests.  All measuring instruments are calibrated by accredited labs according to BDS EN ISO / IEC 17025: 2018.

Types of measurements

"Power transformers of up to 400kV

  • Resistance of insulation
  • active resistance of the windings
  • transformation coefficient
  • bonding group
  • loss of idle running"


Rotary electrical machines: asynchronous motors with short-circuit rotor, asynchronous wound-rotor motors, synchronous machines (3000kW and up to 10000V), DC motors


  • insulation resistance
  • active resistance of the windings
  • active resistance to: damping resistances, rheostats and starting regulating resistors
  • high voltage insulation (machines with voltage from 6kV up to 24kV)
  • idle current (machines with voltage of up to 1000 V and power of up to 300 kW)

Cables for up to 20 kV 

  • insulation resistance
  • insulation with increased rectified voltage
  • integrity of wires and phasing"

Up to 400kV measuring transformers (current and voltage) 


  • insulation resistance
  • active resistance of the windings
  • transformation coefficient
  • volt-ampere characteristics (current transformators)
  • high voltage insulation with industrial frequency (transformators of up to 20kV)

Apparatus (circuit breakers, disconnectors, valve outlets) and insulators for voltage over 1000V


  • insulation resistance
  • high voltage insulation with change frequency (breakers and disconnectors for voltage up to 20kV, valve outlets and insulators voltage up to 10 kV)
  • active resistance of switching and tripping coils, servomotors / for power switches and disconnectors /
  • on and off times /for power switches and disconnectors/
  • transient contacts resistance