Lightning protection box has the function of failure warning and the counting function of lightning strike. It can record 99 times of lightning stroke. Without battery , storage of data in solid storage memory can be kept for 20 years without loss.
When the lightning protection SPD in the box is deteriorated, the remote signal alarm by the instruction lamp, indicating that the lightning protection box has no protection ability and needs to be replaced immediately.

TNR-SW type lightning proof box belongs to the universal box: the advanced design of the maintenance free, has the warning indication function, can resist the continuous lightning stroke ability. There is no need to connect a fuse or an air switch in the loop.
 

          The SW type lightning protection box is suitable for all kinds of AC power supply systems for the exchange of 47-63Hz. It can meet the requirements of terminal protection for electrical equipment, such as residential buildings, intelligent buildings and laboratories.