High Power

The testing capabilities of the High-Power Laboratory, especially high-current tests at low voltages (short-circuit current and breaking capacity), make it unique in the Republic of Croatia. 


Development, type, and special tests of:

  • HV and LV switching devices and fuses
  • Installation switching devices
  • Connection accessories for industrial applications and joint equipment for transmission lines
  • MV and LV switchgear and controlgear,
  • Metal-enclosed busbars
  • Instrument and distribution power transformers etc.

in accordance with valid national and international standards (HRN, EN, IEC, GOST, etc.).

Short-time Withstand Tests

  • Short-circuit withstand tests of LV, MV and HV switching devices, switchgear and controlgear, current transformers and other electrical
  • Short-time current tests of distribution power transformers.
  • Breaking capacity tests of LV switching devices
  • Breaking capacity tests of LV fuses and 1-pole switching devices
  • Short-circuit tests of LV switching devices for determination of arc energy and let-through specific energy i²t
  • Tests of arc propagation effects on parts and compartments during short-circuit in switchgear and controlgear, especially explosion-proof ones

Low-Voltage Tests

  • Complete type tests of switch disconnectors, motor and control switches, and fuses
  • Tests of characteristics of releases, bimetallic overload, and electromechanical relays
  • Tests of characteristics of vacuum switching devices
  • Tests of characteristics of electromagnets
  • Temperature-rise tests of switching devices, switchgear, controlgear and other devices

Brochure: High Power Laboratory (HPL)


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