IEC 62305:2024,IEC 62793 and lightning（thunderstorm) warning systems

IEC 62305:2024,IEC 62793 and lightning（thunderstorm) warning systems

1. Standards Framework and Updates  

- IEC 62305:2024 Series:  

Third Edition Release: Published in September 2024, replacing the 2010 edition after 14 years of revision by IEC TC81 .  

Four-Part Structure:  

Part 1: Fundamental concepts (lightning parameters, zoning) .  

Part 2: Risk management methodologies .  

Part 3: Physical damage and life safety (e.g., contact/step voltage measures) .  

Part 4: Protection of internal electrical/electronic systems (LEMP mitigation) .  

- IEC 62793:2024 (Thunderstorm Warning Systems):  

Focuses on system characteristics for lightning hazard prevention, excluding portable devices .  

Key updates: Simplified alert timelines, reorganized annexes, and normative Appendix E .  

 

2. Integration of Lightning Warning Systems in IEC 62305:2024  

-Risk Management (Part 2):  

Classifies warning systems as adaptive technical measures to reduce injury/equipment risks .  

Economic models justify deployment (e.g., vs. structural LPS) using parameters:  

Lightning density (`Ng`), system reliability (`P_B`), evacuation lead time (`t_w`) .  

-Electronic System Protection (Part 4):  

Mandates LEMP protection for sensors (e.g., electric-field mills):  

- Shielding: Installation in LPZ 0→1 zones with shielded enclosures .  

3. Operational Protocols for Warning Systems  

- System Validation:  

Requires simulated lightning triggers and calibration logs .  

- Emergency Integration:  

Alerts must enable ≥15-minute lead time for evacuations .  

Training protocols using hazard simulations .  

- Cyber-Physical Security:  

Networked systems need LEMP-induced data corruption protections .  

 

4. Implementation and Global Alignment  

- China’s Adoption:  

GB/T 21714.3 revision (20243692-T-469) to align with IEC 62305-3:2024 by 2026 .  

- Cost-Benefit Scope:  

Warning systems optimize costs for temporary sites (e.g., construction, solar farms) .  

- Multi-Hazard Integration:  

Combines lightning alerts with environmental sensors (wind/temperature) .  

 

Conclusion  

The IEC 62305:2024 series and IEC 62793 establish lightning warning systems as critical for dynamic risk mitigation—especially where traditional LPS is impractical.

For large outdoor facilities (stadiums, renewables), warning systems now offer a compliant, cost-effective layer of protection when integrated with structural LPS and operational protocols.