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IONIFLASH PERFORMANCES
Radius of protection of the IONIFLASH air terminal
The radius of protection of an E. S. E. air terminal
depends on its height (h) in relation to the surface to be protected, its
early streamer emission time and the level of protection chosen.
 |
for |
 |
| For |
 |
the graphic method is used,
with the abacuses 2.2.3.3. a, b and c of the NF C 17-102 standard. |
 |
: protection radius |
 |
: height of the point of the
E. S. E. air terminal in relation to the horizontal point passing through the top of the
element to be protected. |
| D |
: 20 m for
protection level I |
|
45 m for
protection level II |
|
60 m for
protection level III |
 |
 |
 |
: early streamer emission time from the
evaluation tests of the
E. S. E. air terminal. |
| D(m) |
: striking
distance or fictitious sphere radius |
|
|
Protected area
The protected area is delimited by the revolution enclosure of the same axis as the E. S.
E. air terminal and defined by the protection radius corresponding to the different
heights h considered ( see diagram below):
|
|
Radius of protection in meters |
| h (m) |
Level 1 * |
Level 2 * |
Level 3 * |
| 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 |
* 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 |
: radius of protection of the E. S. E.
air terminal for the height under consideration. |
|