Single-pole N-PE surge arrester DEHNgap CS, type 2 according to EN 61643-11, consisting of a base part and plugged-in protection module. Specially designed for use in TT systems in 3+1 and 1+1 circuits between neutral conductor N and protective conductor PE. For protecting low-voltage consumer systems against overvoltages. For use in the lightning protection zone concept at the interfaces 0B -1 and higher.