We are offering class b+c surge protection device 12.5 ka.lightning current arresters flp-12,5 v flp-12,5 vs spd type 1 and type 2 – lightning current arrester replaceable varistor module, visual fault signaling varistor lightning current arrester to be installed in low-voltage distributions at the boundary of lpz 0–lpz 1 zones and higher to prevent over voltage effects induced during a lightning strike and to prevent switching over voltage.optional remote status signalling (s).