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Ese Lightning Conductor Protection Radius Calculation

The protection radius of protector is calculated by standard formula given in the French standard NF C 17-102. The formulation is based on the lightning conductor triggering advance (ΔT), installation height (h) and the triggering distance (Δ L).
Rp = √(h(2D-h) )+ ∆L(2D+ΔL) h ≥5m.
ΔL = V × ΔT
Rp: Conductor protection area radius
h : The distance between the point of conductor and the area to be protected
ΔT: Triggering time
D : Triggering distance according to the NF C 17-102 standard
D value is: D= 20 Level-1
        D= 30 Level-2
        D= 45 Level-3
        D= 60 Level-4
        ΔL(m) = v (m/ µs). ΔT(m/µs)

Protection Radius Table


Rp PROTECTION RADIUS(M)

ESE conductors h=Conductors tip
height (m)
2 3 4 5
Level-1
C20 20 30 40 50
C40 24 35 47 58
C60 32 49 66 82
Level-2
C25 23 37 45 56
C40 26 39 52 65
C60 36 54 72 90
Level-3
C25 26 39 52 65
C40 30 45 60 75
C60 40 60 80 100
Level-4
C25 29 43 58 72
C40 34 50 67 84
C60 44 66 88 110

Cosmos Eselc :


PRODUCT PRODUCT NO. MATERIAL REMARK
C 25 DA 01- 0164 Stainless Steel
C 40 DA 01- 0165 Stainless Steel
C 60 DA 01- 0166 Stainless Steel

Lightning Strike Counters :


PRODUCT PRODUCT NO. REMARK
COSMOS DA 01- 0172
1. The Lightning Conductor Unit, COSMOS® ESELC is ESE type. (ESE- Early Streamer Emmission)
2. The Lightning Conductor Unit, COSMOS ®ESELC fully comply with NF C 17-102 standards. The METU High Voltage Lab. Test report acc. to NF C 17-102 is available upon request.
3. Δ T trigger time advantage of COSMOS® ESELCfully comply with NF C 17-102 standards.
4. The COSMOS ® ESELChavea protection system on the active parts for prevention against lightning discharge. So, there is no requirement for additional connection elements, such as cables etc.
5. The COSMOS ® ESELCis designed as compact as possible to maintain installation and logistics advantage.