Page 5 - Planning_Lightning_Protection

Human life Service to the public Cultural heritage Economic value

Photo: Lightning Protection Paul Hahl, Frankfurt

Risk analysis according to
IEC 62305-2

Risks to be considered
Risk management and assessment of the building At the beginning of a risk analysis, the type of building use
A risk analysis is performed to assess the potential risk for is required to determine the risks to be considered for the
a building. Based on this analysis, measures can be taken object requiring protection.
to reduce the risk. The aim is to select economically sound
protection measures which are perfectly adapted to the When performing a risk analysis, four different risks are
building’s properties and type of use. distinguished:
• Risk R : Risk of loss of human life
1
A risk analysis does not only allow to determine the class • Risk R : Risk of loss of services to the public
2
of LPS, but also to develop a complete protection concept • Risk R : Risk of loss of cultural heritage
including the necessary LEMP protection measures. 3
• Risk R : Risk of loss of economic value
4
The aim of a risk analysis is to reduce the existing risk to a One or more risks can be relevant. The planner has to decide
tolerable risk R . Therefore, the tolerable risk R is defined which risks to select.
T
T
when selecting the risks. These tolerable risks are specified
in the standard, however, responsible authorities having
jurisdiction may define them in another way.

Risk R : Risk of loss of Risk R : Risk of loss of Risk R : Risk of loss of Risk R : Risk of loss of
3
4
2
1
human life services to the public cultural heritage economic value

LPS = Lightning Protection System
LEMP = Lightning Electromagnetic Pulse 5