Protection Performance - Lightning Protection International Stormaster ESE 15 Installation Manual

Protection Performance

The protection radius (R
ESE terminal is calculated using the formula
as defined in NF C 17-102 (September 2011),
namely:
√
(1) Rp(h) = 2rh − h
and
(2) Rp = h x Rp / 5 for 2 ≤ h < 5 m
5
where h = Stormaster height relative
to the area being protected (m)
Rp = value of Rp from Eqn. (2) when h = 5 m
5
r = 20 m for protection level I (Very High protection)
30 m for protection level II (High protection)
45 m for protection level III (Medium protection)
60 m for protection level IV (Standard protection)
and Δ = Stormaster time and height advantage according to the
Stormaster model installed:
Stormaster ESE 15: Δ = 15 µs
Choices:
Stormaster ESE 30: Δ = 30 µs
Stormaster ESE 50: Δ = 50 µs
Stormaster ESE 60: Δ = 60 µs
www.lpi.com.au
) of a Stormaster
p
+ Δ(2r + Δ) for h ≥ 5 m
2
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Rp1
h1
h3 h2
Rp3
Rp2
3