The lightning protection radius (m) of a DEFYSTORM® ESE terminal is evaluated based on the 2011 NF C 17-102 formula.
It is calculated according to the following criteria:
- The trigerring time ΔT of the DEFYSTORM® ESE terminal.
- The protection level (I, II, III or IV) required for the installation and determined according to the lightning exposure of the area.
- The actual height of the rod (m) placed above the area requiring lightning protection.
- The hazard assessment (fire or explosion hazards, attendance) and the type of facility.