TerraStreamer®
Early Streamer Emitters (ESE)
ALLTEC
Corporation is proud to offer its line of Early Streamer Emission terminals
for structural lightning protection. The TerraStreamer® ESE
utilizes advanced electronics to provide lightning protection to facilities
that would otherwise be difficult or cost prohibitive to protect by conventional
means.
The TerraStreamer® ESE Lightning Terminal is an externally mounted,
proactive, structural lightning protection device and is designed to activate
itself in the moments directly preceding an imminent direct strike. The installation
of a TerraStreamer® ESE Terminal combines the best advantages of two
systems: the direct path to ground of a conventional lightning protection system,
and state-of-the-art ESE technology employed in the TerraStreamer’s internal
design. These combined advantages ensure that the TerraStreamer® ESE
System provides a secure, increased zone of protection for large structures or
open areas.
The TerraStreamer® ESE terminal is designed and constructed with the latest advanced electronics circuitry encased in a lightweight and unobtrusive stainless steel housing for durability and long service life.
The ESE Principles
Early Streamer Emitter Protection Theory
The theory of operation for ESE terminals is to create
an upward propagating streamer earlier than conventional air terminals
or other objects on the earth, thereby offering larger zones of protection.
The TerraStreamer® does this by collecting and storing ground
charge during the initial phase of a thunderstorm development.
Once
a thunderstorm begins creating downward step leaders, the ambient electric
field intensity in the area of the ESE terminal increases. When this
electric field intensity reaches a preset level, it triggers the terminal
to release the stored ground charge, forming an upward streamer microseconds
earlier than other objects in the immediate area.
This development of an upward streamer earlier in time and space ensures that the TerraStreamer® ESE terminal will be the target of the developing lightning strike. The selection of the TerraStreamer® model, placement, and mounting height above the protected area all factor into formulas calculating the dimensions of the protection area.
ESE Protection Radius
Early Streamer Emitter Protection Radius
The
standard protection radius Rp of the TerraStreamer® is linked (according
to NFC17-102 1995 standard, to ∆T as given left) to the protection
levels I, II, or III (as calculated in Annex B of NFC17-102) and to
the height of the TerraStreamer® above the protected structure (H,
defined by NFC17-102 as a minimum of 2m).
Protection Areas |
||||
 |
||||
H(m) |
TSE-25 Rp |
TSE-40 Rp |
TSE-60 Rp |
|
| Level I | 2 |
14 |
23 |
31 |
4 |
30 |
46 |
63 |
|
6 |
37 |
58 |
79 |
|
8 |
38 |
59 |
79 |
|
10 |
39 |
59 |
79 |
|
| Level II | 2 |
20 |
30 |
39 |
4 |
40 |
60 |
78 |
|
6 |
52 |
76 |
97 |
|
8 |
53 |
77 |
98 |
|
10 |
55 |
77 |
99 |
|
| Level III | 2 |
24 |
34 |
46 |
4 |
46 |
68 |
85 |
|
6 |
59 |
84 |
107 |
|
8 |
61 |
85 |
108 |
|
10 |
62 |
87 |
109 |
|
