ESE Protection Levels

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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

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