Home » English riddles » Protection » Protection Riddle No. 80 -Protection of TV,Radio,Telephone during thunderstorm » Reply To: Protection Riddle No. 80 -Protection of TV,Radio,Telephone during thunderstorm Reply To: Protection Riddle No. 80 -Protection of TV,Radio,Telephone during thunderstorm 2021-08-03 at 11:08 am #2704 Bipul pandey What is SPD protection scheme?