... been processed with special treatment to prevent them from loosening.StandardsGB 1094.1-1996 GB 1094.2 ... Rated Power: 30~2500kVA2)Rated HV: 6KV,6.3KV, 10KV, 10.5KV,11KV,15KV,20KV,22KV,33KV 35KV,36KV3)Rated LV: 0.4kV,0 ... single or three;5)Rated frequency: 50Hzor 60 Hz;6)Vector group: Dyn11, Yyn0 or others;7)Short ... circuit impedance: 4%, 4.5% ,6% or others in accordance to client needs;8)Tapping ...