FXBW4-35 / 100 composite suspension insulator insulator type structure height H.mm minimum arc distance L.mm minimum nominal creepage distance mm full-wave lightning impulse withstand voltage kV (peak value) of not less than impulse wet withstand voltage kV (peak ) Not less than power frequency withstand voltage kV (rms) of not less than wet FXBW2-35 / 100 650 ± 15 470 810 230 - 108 95 FXBW4-35 / 100 650 ± 15 470 1015 230 - 108 95