Tested combined arrester type 1+type 2+type 3 according to DIN EN 61643-11 for TT and TN-S systems (3+1 circuit), can be installed completely without tools using Click+Power connection technology for the 40 mm busbar system and push-in earthing terminal, for use in the main power supply system according to DIN VDE 0100-443 in buildings (also with overhead line feed, without external lightning protection system). A suitable cover clip according to DIN VDE 0603-1 for every commercially available meter panel is included in the scope of delivery.