... , 54~258kV.All products meet the standards of ISO9001and KEMA Series 1 Polymer Housed Metal-Oxide Surge Arrester without gap,Voltage ... 6-36kV, all ratings are available from 5kA to 10kA.Series 2 Polymer Housed with Different diameter sheds Metal-Oxide Surge Arresterwithout ... arrester without gap,allratings are available from 5kA to 10kA. Series 4 Station Class Surge Arrester, 54~258kV,all ratings are ...