Lightning Protection SCHIRTEC AG - Blitzschutz und Blitzableiter

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Explanation Proteciton Radius Table

Here you will find an explanation on how to read the protection radius table correctly.

Protectionlevel

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

  • if the object is inhabited or not
  • if the object is expolosiv or not,
  • material of the roof and the roof construction (wood, metall,...)
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.

Protection Level Calculator

Strike Risk Assessment Program

 

Example 1 for S-A:
Single-familiy-home; Protection Level 1
Example  2 for S-A:
Factoryhall; 150 m x 50m, Protection Level 1
domek_new
hala_produkcyjna

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.
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

Rp(m) S-A (�L: 60m) S-AS (�L: 30m) S-DA (�L: 60m) S-DAS (�L: 45m)
h I II III IV I II III IV I
 II
 III
 IV
 I II III IV
2 31 35 39 43 19 22 25 28 31
 35
 39
 43
 25 28 32 36
4 63 69 78 85 38 44 51 57 63
 69
 78
 85
 51 57 64 72
5 79 86 97 107 48 55 63 71 79
 86
 97
 107
 63 71 81 89
6 79 87 97 107 48 55 64 72 79
 87
 97
 1007
 63 71 81 90
8 79 87 98 108 49 56 65 73 79
 87
 98
 108
 64 72 82 91
10 79 88 99 109 49 57 66 75 79
 88
 99
 109
 64 72 83 92
20 80 89 102 113 50 59 71 81 80
 89
 102
 113
 65 74 86 97
30 80 90 104 116 50 60 73 85 80
 90
 104
 116
 65 75 89 101
60 80 90 105 120 50 60 75 90 80
 90
 105
 120
 65 75 90 105

Key:

h: Installation height
I/II/III/IV: Protectionlevel
Rp(m): Protectionradius in m
5
6
Recommended
installation height

 

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