The rolling sphere method can used determine
the required lengths air-termination rods and the
distances between them. Only
the planning methods named IEC/EN 62305-3 shall
be used for planning. This should also taken into ac-
count with all so-called "active" air-termination sys-
tems, such ESE "Early Streamer Emission".TBS
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Rolling sphere method (dark grey areas are areas risk strike)
The building that protected must fitted with
air-termination systems such way that sphere
with radius determined the basis the lightning
protection class cannot touch the building. Others, such the "Collection
Volume Method" (CVM), are excluded the stand-
ard. The air-termination rods
must arranged such way that all parts the
structure protected are located the protection
area the air-termination system. Air-termina-
tion systems are required the dark grey areas.
For all types air-termination system, only the actual
dimensions the metallic air-termination system shall
be taken into account during planning according to
IEC/EN 62305-3.
Air-termination rod
Rolling sphere radius
Protection area air-termination rod determined us-
ing the rolling sphere method
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2018
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2020/01/10
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2020/01/10
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61
Chapter The external lightning protection system
