IPRD20modular surge arrester, 1p+N, 350V. range: Acti 9 - product name: Acti 9 iPRD - product or component type: surge arrester with pluggable cartridge - device short name: iPRD20 - device application: distribution - surge arrester type: electrical distribution network - earthing system: TN-S, TT. Benefits: Certified coordination with disconnection circuit-breakers, The strength of the connections,.. Applications: Protection of electrical installations in all industrial and tertiary buildings against induced or conducted surges caused by indirect lightning strokes..