| Lightning
rod height |
PROTECTION
RADIUS OF AIR TERMINALS ION STREAMER in meters(1)
(according
to standards) |
| h(m) |
Level
1 (2) |
Level
2 (2) |
Level
3 (2) |
| 2 |
32 |
40 |
44 |
| 3 |
48 |
59 |
65 |
| 4 |
65 |
78 |
86 |
| 5 |
79 |
97 |
107 |
| 6 |
79 |
97 |
107 |
| 8 |
79 |
98 |
108 |
| 10 |
79 |
99 |
109 |
| 20 |
80 |
102 |
113 |
| 40 |
77 |
105 |
118 |
| 60 |
69 |
104 |
120 |
If there is a risk for environment (C5 = 10), the
protection radius is
reduced to 40% according to the interpretation sheet of
the NF C
17-102 standard from December 2001.
The protection level is determined up to NF C 17-102
standard
(enclosure B).
|
hn:
height of the point of the E.S.E air terminal in
relation to the horizontal plane passing through the top
of the element to be protected.
Rpn:
protection radius of the E.S.E. air terminal for the
height under consideration |
