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Risk Analysis lightning according UTE C 17-108


R1 : Relative risk a human life

Parameters Type Data Name Calculations Units
Lightning
Density		 Country/Region Ng Density lightning
strike
STRUCTURE Width (m) W
Length (m) L
Height (m) H
Tower/
Chimney height		 (m) Hp
Power Supply
Lines		 Type Power Supply
Lines
Surface of
capture		 Building Ad1 m2
Tower/
Chimney		 Ad2 m2
Structure Ad m2
Power
Supply Lines		 Ai m2
Location of
the structure		 Cd Location of
the structure ?
Yearly
number of
dangerous
events		 On the
structure		 Nd
On the Line Ni
Risk for
human beings		 h Danger  ?
Risk of fire rf Risk of
fire ?
Occupation
Structure		 Lf Occupation  ?
Probability of
damage due to
direct lightning
discharge		 On the
structure		 Lightning air terminal : Pd 0,2
On the line SPD :
Pi 0,03
Risk for
human life		 R1
Risk assessment results Uncomplete

 

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