Product Description
B25, B25M, B50, B80 and B100 are total current gas discharge tubes type 1 according to EN 61643-11 and are intended for use in TNS and TT systems (3+1 or 1+1) at the boundaries of LPZ 0 – 1. B25, B25M, B50, B80 and B100 are to be installed between N and PE only.