Installing smart lightning protection isn’t just about preventing strikes—it’s about safeguarding operational continuity, infrastructure, and human life.
⚡ What is an ESE System?
Unlike traditional Franklin rods, which passively wait for a lightning strike, Early Streamer Emission (ESE) systems like the Prevectron 3® S60 actively emit an upward leader earlier in the discharge process—creating a wider protective zone. This advanced ionization, defined by a parameter called ΔT, allows for a significantly larger coverage radius compared to passive systems.
✅ The S60 model offers:
ΔT = 60 μs, with an effective protection radius up to 120 meters depending on mounting height and site geometry
Fully compliant with NF C 17-102:2011
Ideal for industrial zones, rooftops, or large open premises
Scope included:
✅ Site assessment and risk calculation per IEC 62305 / NF C 17-102
✅ Optimized mast height selection for maximum protection
✅ Strategic down conductor routing and equipotential bonding
✅ Grounding system achieving <10 Ω resistance through multiple rods
✅ Surge Protection Devices (SPD) at key distribution panels for internal protection
📐 How is the Protection Radius Calculated?
As per NF C 17-102:2011,
for h ≥ 5 m, the protection radius is:
Rp(h)=2rh−h2+Δ(2r+Δ)
Rp(h)=2rh−h2+Δ(2r+Δ)
Where:
h: height of ESE above the highest protected point
r: standard value based on protection level (20, 30, 45, or 60 m)
Δ: early streamer emission efficiency = ΔT × 10⁶ (so for S60, Δ = 60)
🔎 Example Calculation (Level IV, r = 60 m, h = 6 m, Δ = 60):-
Rp=2×60×6–62+60(2×60+60)=720–36+60(180)=11,484≈107.2 m
Rp=2×60×6–62+60(2×60+60)
=720–36+60(180)
=11,484
≈107.2 m
✅ This matches the manufacturer’s data, validating the coverage under actual site conditions.
🏭 Why It Matters
Industrial sites often house mission-critical equipment, PLCs, VFDs, control panels, and sensitive electronics. A single lightning event can:
– Cause severe equipment damage
– Lead to extended downtime
– Jeopardize personnel safety
By choosing a smart ESE system like the Prevectron 3® S60, the client made a strategic investment in operational resilience and long-term infrastructure protection.
🔍 Key Takeaways
-Always combine standards-based design with real field measurements.
-Don’t overlook the importance of grounding and bonding—the best ESE won’t work without a solid earth connection.
-Surge protection must be coordinated alongside external LPS to protect internal systems.
– Calculate your protection radius using official formulas, not just brochures.
