... IEC,ANSI,GB 2.up to 36kv 3.ISO9001,ISO14001,OHSAS18001 4 type test report 12kv switchgear KYN18A-12 AC ... AC 3-10 KV three-phase 50 Hz single bus power system to receive and distribute the power ... voltageKV12Rated frequencyHz50/60Rated insulation level1 min power frequency withstand voltageKV42 (isolation fracture: ... circuit drop-out currentKA20, 25, 31.5,40,50,63Rated short circuit making currentKA50 ...