... (mm):356, 559,737, 1015,11454)Dry arcing distance(mm):165, 241, 311, 368, 4385)Cantilever strength(KN):12.56)low ... , 100, 125, 1507)critical impulse flashover voltagea:positive (KV):130, 180, 210, 255, 290b:negative (KV):155, 205, 260, 340, 3808)radio ...