Application 1 Rated voltage kV 1262 Rated current A 1250,1600,2000,2500,31503 Rated short-3 time withstand current kA 1.5/4s,40/4s4 Rated peak withstand current kA 80,1005 Rated lightning impulse withstand voltage kV Across open breaks 550+100To earth 550 6 Rated 1min power frequency..