Design Specifications For Installing Surge Arresters At The Power Input Terminal

In a surveillance system, 9kv 5ka lightning arrester is typically installed at the power input of cameras, hard disk recorders, and surveillance power supplies. Power lines are the primary path for lightning strikes or grid surges. Placing a 9kv lightning arrester power supply at the power input can guide and discharge surge voltages or currents before the equipment receives power.

The power input is the first point of entry for the equipment's energy. Without protection at this point, when external voltage transients or surges occur, energy will directly enter the internal power module, potentially causing component damage, power instability, or even system failure. Most surveillance systems—whether cameras, DVRs/NVRs, or power supply modules—have power modules that are highly sensitive to surge impacts. By adding a lighting arrester 11kv power supply at the power input, overvoltages can be reduced before reaching the core power module.