Lightning Protection System Main Components

Lightning Protection System Main Components

1.1. External Lightning Protection (Direct Lightning Strike Protection)

1.Air-termination system: Lightning rods, lightning strips, lightning nets, overhead lightning conductors, lightning towers.

2.Down conductors: Conduct lightning current from the air-termination system to the grounding device.

3.Earthing system: Earth electrodes, earthing busbars, grounding grids; discharge lightning current into the ground.

2. 2.Internal Lightning Protection (Induced Lightning & Lightning Surge Invasion Protection)

1.Equipotential bonding: Unified equipotential connection for metal pipelines, cable trays, equipment enclosures and metal doors & windows.

2.Shielding system: Metal shielding layers of cables, metal conduits and machine room shielding to reduce electromagnetic induction.

3.Wiring lightning protection: Separated layout of strong and weak current cables with reasonable wiring spacing.

3. 3.Surge Protection Device (SPD) System

Classified by installation position:

●Power SPD: Three-level protection for main power distribution, floor power distribution and equipment front end.

●Signal SPD: Lightning protection for network, monitoring, telephone, access control, fire protection and IoT signal lines.

●Feeder SPD: Special use for base stations, antennas and satellite receiving equipment.

4.Earthing & Auxiliary Lightning Protection System

Artificial earth electrodes, natural earth electrodes (building foundation steel bars), main earthing lines, equipotential terminal boxes, lightning detection, lightning isolation and overvoltage monitoring devices.

Concise Summary

A complete lightning protection system consists of six core links:

Air-termination → Down conduction → Earthing → Equipotential bonding → Shielding → SPD surge protection。