Combined surge arrester PRD1 25r. 1-pole+N, surge arrester class type 1+2, nominal discharge current 25kA, highest continuous voltage (Uc) 350V, nominal voltage (Un) 230/400V. Surge protection for low-voltage systems. Type 1+2 offers additional protection against transient overvoltages. Installation takes place at the system's feed-in point. Surge arresters of the PRD1 25r and PRD1 Master series have plug-in protection modules. The combined surge arrester PRD1 25R meets the following standards - IEC 61643-1 and EN 61643-11.