You can now read the protective angle
(α) off the vertical axis (“1”).
All building parts within this angle are protected. Transfer the protective angle the building.
Protected area
α Protective angle
a Distance furthest point protected area
h Height the building
Installing the air-termination system
Lightning protective angle α
Ridge height m
Lightning protection classes II, III, IV
Diagram assist determining the protective angle accordance with IEC 62305
2nd step: Determine the protective angle
Example:
The height the building (in this case: is
entered onto the horizontal axis the diagram (see
point axis "2" graph above).
Determine the protected area follows: transfer the
height the building the diagram and read off the
protective angle.
Transfer the protective angle the building.1st step: Installing the air-termination system
First, round conductor installed all primary im-
pact points such ridges, crests edges.
TBS
Blitzschutz-Leitfaden
2018
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Chapter The external lightning protection system
. Then proceed vertic-
ally
until you meet the curve for your lightning protectio (in
this case: III). our example, this angle 62° with
protection class III and building height m. our example, the angle
is 62°. All build-
ing parts within this angle are protected
