BDM-024-V / 1-FR1-CIB Lightning current arrester with two-stage overvoltage protection designed for the CIB bus installation at the entrance to the building near the protected equipment, at the interface of zones LPZ 0 – LPZ 1 and higher can also be used to protect the interfaces of control systems MaR, EZS, EPS, etc. against longitudinal overvoltage (line - protective earth) rough protection and against transverse overvoltage (core - core, GND) rough and fine overvoltage protection removable module, coupling impedance (R - resistance), line separated from protective earth by lightning arrester