GROMOSTAR 25
A lightning conductor with early leader emission (Fr. PDA - Paratonnerre à Dispositif d'Amorçage) is the main element of the lightning protection system protecting a building against fire and damage resulting from lightning discharges. In stormy conditions, it generates ionization earlier than other elements of the protected building, thanks to which it directs the lightning current to itself. The GROMOSTAR lightning conductor ensures the preferred point of lightning strike, while protecting all elements in its protection radius.
The GROMOSTAR 25 lightning conductor is available in two material versions: stainless steel or copper.
Technical data:
| Compliance with standards: |
NF C17-102 (2011-09), EN 62561-1 |
| Advance time ΔT: |
25 µs |
| Material: |
stainless steel or copper |
| Overall length: |
391 mm |
| Diameter: |
Ø50,8 mm (stainless steel) / Ø63 mm (copper) |
| Mounting: |
M16 x 40 mm |
| Weight: |
1,85 kg |
| Warranty period: |
10 years
|
Radius of the protection zone:
H - height of the lightning conductor over protected elements (H ≥ 2 m required)
R - radius of the protection zone
| ΔT[μs] |
Type |
Level of protection (effectiveness) |
Protection radius R (m) for height H (m)
|
| H=2 |
H=3 |
H=4 |
H=5 |
H=7 |
H=10 |
H=20 |
| 25 |
GROMOSTAR 25 |
I (98%) |
17 |
25 |
34 |
42 |
43 |
44 |
45 |
| II (95%) |
20 |
29 |
40 |
50 |
50 |
52 |
55 |
| III (90%) |
23 |
34 |
46 |
57 |
58 |
63 |
65 |
| IV (80%) |
26 |
39 |
52 |
65 |
66 |
69 |
75 |
For buildings requiring protection at the level of 1 ++(99.9%) and for buildings posing a threat to the environment (specific hazard factor hf=20 according to the EN 62305-2 standard) or that may cause environmental contamination (hf=50 according to the EN 62305-2 standard), the values of the protection radius should be reduced by 40%.
Radius of the protection zone:
H - height of the lightning conductor over protected elements (H ≥ 2 m required)
R - radius of the protection zone
For buildings requiring protection at the level of 1 ++(99.9%) and for buildings posing a threat to the environment (specific hazard factor hf=20 according to the EN 62305-2 standard) or that may cause environmental contamination (hf=50 according to the EN 62305-2 standard), the values of the protection radius should be reduced by 40%
To download
Certificate of the Institute of Power Engineering (PL)
Technical card - GROMOSTAR 25 (PL)
Technical card - GROMOSTAR 25 (EN)
