Supply Of Class "B" And "C" Surge Protection Device (Spd) Type I & Ii With Visual Indication An D Potential Free Contact To Remote Monitoring As Per Rdso Spec No. Rdso/Spn/165/2012 Version 3.0 Or Lat Est And Iec Standard 61643 For Signals Line 230Vac Application With Handling Lightning Surges Of 8/20 Micro Seconds. One Set Consists Of 3 Nos. Of Spd (Two Nos. Of B Class (L-N,L-E) And One No.Of C Class (L-N) All Encl Osed In A Box With Kema Or Vde Certified As Per Latest Iec 61643-11-2011 Standard Class B & C Surge Prote Ction Device Required With Three Modules. Make- Obo/Phoenix/Betterman/Dehn Or Similar. [ Warranty P Eriod: 30 Months After The Date Of Delivery ] ]