Protection level
According to NF C 17-102 Ed. 2.0, the standard protection radius (Rp) of the ORBITAL ESE is linked to ∆T, the protection levels I (98%), II (95%), III (90%) or IV (80%) and the height of the ORBITAL ESE 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 exists in an inhabited place or not • if the targeted object is explosive or not, • material of the roof and the roof construction (metal, plastic, concrete…) The more precious and vulnerable object is the higher the level of protection needed. e.g. a school with a metal roof could be attributed to protection class 1. A telecommunication poles of low value could attributed to the protection class 4. The protection class can be calculated with ORBITAL lightning risk programme.
h
Height to install, higher the lightning terminal is installed the greater the protective radius Rp needed (m)Rp(m)
Protection radius, we suggest to install the lightning terminal within a height of 5 up to 6 meters so then you can then achieve a high level of protection.Example 1 for COMET:
Home; Protection Level 1
The lightning terminal COMET has been installed at a height of 4m.
The protection radius needs to be specified according to NFC 17-102/2011 edition standard with 63m, the efficient protection is higher, according to our test reports.
Example 2 for ZERU:
Factory Working Place; 150 m x 50m, Protection Level 1
There can be seen two lightning terminals S-A to install at a height of 6m.
The radius overlap and provide for the whole production facilities at sufficient protection level.
The protection radius should be specified according to NFC 17-102/2011 edition with 79m, the efficient protection is higher, according to our test certificates.
Protection Radius Table
