Distribution Equipment Laboratory performs:

• short-time withstand current and peak withstand current tests of switchgear and switching devices up to 550 kV:
  - in three-phase circuit up to 31,5 kA/3s,
  - in single-phase circuit up to 63 kA/2s,
• making and breaking tests of circuit-breakers, switches and switch-fuse combinations up to 36 kV,
• making and breaking tests of disconnectors and earthing switches up to 550 kV,
• breaking tests of current-limiting fuses and expulsion fuses up to 24 kV,
• internal arc tests of MV switchgears and HV/LV prefabricated substations,
• dynamic ability to withstand short-circuit tests of distribution transformers up to 36 kV and special up to 120 kV,
• short-circuit tests of surge arresters up to 110 kV,
• AC power arc tests of insulators sets up to 420 kV,
• short-time current tests of current and combined transformers up to 145 kV,
• short-circuit withstand capability of voltage and combined transformers up to 145 kV,
• mechanical operation tests of switches, switch-fuse combinations, disconnectors and earthing switches,
• mechanical tests of current, voltage and combined transformers,
• mechanical shock tests on fuses,

• short-time current tests of rectifier groups (transformer + rectifier),
• cable spike tests,
• time-current characteristics of current-limiting fuses up to 24 kV.