... : performance requirements and experiment waysThe ministry of information standard: YD/T 1235.1—2002 communication bureau low voltage electric system SPD ... -lightning counternormal discharge current In(kA)Maxi continuous working voltage (V~)combined method(see sheet 2)Maxi discharge current Imax(kA)design No ... ,80,100,120,150 kA·Normal discharge current (8/20µs) In 5 ,10 ,20 ,30,40, 50, 60,70 kA ...