... . Technical parameters of high voltage switchgear .ItemUnitValueRated voltageKV11kv 22kv 36kv 40.5Rated insulation level1 min power frequency withstand voltageKVPhase-phasePhase-earthIsolation fracture95118Rated ... , 31.5Specified short circuit drop-out currentKA20, 25, 31.5Rated withstand current (peak)KA50, 63, 80Rated short circuit making currentKA50, 63 ...