Iec 62305-3 Pdf 'link' -
The primary purpose of an external LPS is to intercept direct lightning strikes, conduct the current safely to the earth, and disperse it into the ground. It consists of three main parts. 1. Air-Termination System
While Part 1 provides general principles and Part 2 deals with risk management, Part 3 is the engineering guide to physically safeguarding a building. Air-Termination Systems: Capturing lightning strikes.
Details the actual design and installation of physical defense systems.
Verification, maintenance and documentation IEC 62305-3 requires that LPS installations be documented (drawings, calculations, risk assessment summary) and periodically inspected and maintained. Verification involves checking continuity, bonding, earth resistance and the physical integrity of components. The standard sets recommended intervals for inspection and criteria for re-assessment after modifications, severe lightning events, or changes in building use. iec 62305-3 pdf
The potential difference between a person's feet spaced one meter apart on the ground surface. Mitigation Strategies
Provides the mathematical framework to calculate if a building requires protection.
To safely intercept and ground a strike, the standard outlines three primary subsystems: The primary purpose of an external LPS is
Dictates the structural design and installation parameters for internal and external lightning protection systems.
Systems deployed in explosive environments or highly corrosive areas should undergo complete inspections every year. Sourcing the Official IEC 62305-3 PDF
| Class | Rolling Sphere Radius (m) | Mesh Size (m x m) | Typical Application | | :--- | :--- | :--- | :--- | | | 20 | 5 x 5 | Power plants, explosive storage, heritage sites. | | II | 30 | 10 x 10 | Telecom towers, high-occupancy buildings. | | III | 45 | 15 x 15 | Industrial buildings, schools. | | IV | 60 | 20 x 20 | General structures where risk is low. | severe lightning events
IEC 62305-3 classifies lightning protection into two main categories: External LPS and Internal LPS. A fully compliant system requires both to function successfully. 1. External Lightning Protection System
An internal system prevents dangerous sparking inside the structure caused by the lightning current flowing through the external components.
Strengthened requirements for LPS component testing and safety, referencing the IEC 62561 series for reliable components.
In the digital age, having access to the IEC 62305-3 PDF is a workflow accelerator.
(defined by the LPL) is rolled over the structure. Areas touched by the sphere require protection.
