Protection level

According to NF C 17-102 Ed. 2.0, the standard protection radius (Rp) of the SCHIRTEC E.S.E. is linked to ∆T, the protection levels I (98%), II (95%), III (90%) or IV (80%) and the height of the SCHIRTEC E.S.E. above the structure to be protected (H, as a minimum 2 m)

The protection level of the object depends on several factors such as:

• if the object is inhabited or not
  
• if the object is explosive or not,
  
• material of the roof and the roof construction (wood, metal,…)

The more valuable and vulnerable the object is the higher the level of protection needed. e.g. an inhabited house, with a metal roof could be attributed to protection class 1. A telephone pole of low value could attributed to the protection class 4. The safety class can be calculated with our lightning risk program. 

h

Installation height, the higher the lightning conductor is installed the greater the protective radius Rp (m)

Rp(m)

Radius protection, we recommend  to install the lightning conductor in a height of 5 to 6 meters because you can then achieve a high level of protection.

Example 1 for S-A:
Single-family-home; Protection Level 1

The lightning conductor  S-A has been installed at a height of 4m.
The protection radius has to be specified according to NF C 17-102 standard with 63m, the effective protection is bigger, according to our test reports.

Example  2 for S-A:

Factory hall; 150 m x 50m, Protection Level 1

There were two lightning conductors S-A installed at a height of 6m.
The radii overlap and provide for the entire production facility sufficient protection.
The protection radius must be specified according to NF C 17-102 with 79m, the effective protection is bigger, according to our test reports

Protection Radius Table

Legend:

Protection Level Calculator

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