IPRD8modular surge arrester, 3p+N, 350V. range: Acti 9 – product name: Acti 9 iPRD – product or component type: surge arrester with pluggable cartridge – device short name: iPRD8 – device application: distribution – surge arrester type: electrical distribution network – earthing system: TN-S, TT – [Uoc] open circuit voltage: 10 kV type 3 common mode N/PE, 10 kV type 3 differential mode L/N.