... Voltage of Arresters (Ur),KV305Continuous operating voltage(Uc),KV246Nominal discharge current(Ln),KA107High Current 4/10 Impulse withstand, KA1008Long ... at 500/1000A69 Impulse Current as applicable,KV 12Line Discharge ClassI13Pressure Relief class&corresponding fault current,KAB 2014Arrester ... at 1.05 times system highest voltage,V<=50017Max.Partial discharge in the arrester at 1.05 time continuous <= ...