Retrofit Surge Protection UnitsSuitable for use on TN-C-S (PME) / TN-S / & TT networks.Provides protection against the effects of transient over voltages.Ideal for installation where it is not possible to accommodate a suitable surge arrester directly within the existing consumer unit.Designed and tested for use with Lewden branded distribution boards.5-year warranty.Integral coloured flag indicating SPD health status.Technical Specification:Surge Protective Class: Type 2Manufacturing Material: SELF-EXTINGUISHING THERMOPLASTProtection: MCBFrequency: 50-60HzPhase: 1Rated Operating Voltage: 230VEarthing Systems: TN-C-S-(PME)Earthing Systems: TTEarthing Systems: TN-SFor Cables ø: 35mm²Dimensions: 226x118x102mm (HWD)Net Weight: 0.84KGStandards: EN 61439-2:2011, EN 61643-11:2012, EN 61439-1:2011, IEC 61643-11:2011