How To Choose Surge Protector And Signal Line Spd Introduction
1. To select surge protective device, you first need to understand some parameters and their working principles.
(1) Residual voltage Ur refers to the residual voltage value under the rated discharge current In.
(2) Protection voltage Up represents the voltage characteristic parameter between the SPD limiting terminals. Its value can be selected from the list of preferred values and should be greater than the highest value of the limiting voltage.
(3) Voltage switching SPDs mainly discharge 10/350μs current waves, while voltage limiting SPDs mainly discharge 8/20μs current waves.
2. Signal line surge protector
Signal line surge protection device is actually a signal lightning arrester, which is installed in the signal transmission line, usually at the front end of the equipment, to protect subsequent equipment and prevent lightning waves from entering the signal line and damaging the equipment.
