... vibration roomMajor technical index: ItemUnit Data Rated voltage kv31.5kARated short-time withstand current kA40.5kvRated short-circurt durature s4Rated short ... center distancemm280,300,350Rated insulting level PF withstand voltage (one min)kv 42 Lightning impulse withstand voltage 75Mechanical endurancetimes 2000 JN22-40.5/ ... :.Packing pictures : JN22-40.5/31.5 Indoor High Voltage AC Earthing Switch