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6 2
Note!
6 3
Mounting instructions isCon
Calculating, checking and maintaining the separation
distance
I f the approval authorities, the insurance company or the customer have
not yet specified whether the appropriate building should be protected by
a lightning protection system, the planner should carry out a risk evalu-
ation according to DIN EN 62305-2 /IEC 62305-2, which will indicate
whether a lightning protection system is required or not.
• Calculate the separation distance at the connection point of the
isCon
conductor according to DIN EN 62305-3 (VDE 0185-305-3)/
®
IEC 62305-3 Section 6.3. Measure the distance (l) from the connec-
tion point of the isCon
protection equipotential bonding, e.g. earthing system, metal parapet
of construction with electrically connected metal facade or steel re-
inforcement (high-rise building).
• Check whether the calculated separation distance (s) is less than or
equal to the specified equivalent separation distance of the isCon
conductor.
• If the specified equivalent separation distance is exceeded, you must
install additional conductors:
– The current is split up if you install multiple insulated conductors
in parallel. The reduced current division coefficient k
reduces the calculated separation distance (s).
– Install the conductors at least 20 cm apart. This keeps the
magnetic fields to a minimum, preventing the conductors from
influencing each other.
– When conductors are routed directly beside one another, the in-
ductivity of the total arrangement is not reduced by the factor n,
and the current division coefficient k
– Install the conductors as far apart from each other as pos-
sible, if the installation conditions permit this. Ideally, the second
conductor should be run to the ground on the other side of the
building.
Conductor lengths and lightning protection classes
The possible length of an isCon
following formula, according to the calculated separation distance (s), the
lightning protection class (k
electrical insulation (k
s • k
m
L(m) =
k
• k
c
i
The following Tab. 8 offers an example of the maximum possible lengths
of the isCon
conductor at a separation distance s = 0.75 m in air.
®
Should the conductor lengths shown there be insufficient for the con-
struction project, we recommend having a lightning protection specialist
carry out a detailed calculation of the factor k
The above formula shows that longer conductor lengths are possible with
a greater number of conductors and thus the reduction of the factor k
lightning protection system
®
conductor to the next level of the lightning
®
conductor can be calculated using the
®
), the number of conductors used (k
i
) (see DIN EN 62305-3):
m
Planning an installation
thus also
c
is not reduced accordingly.
c
) and the
c
using the building data.
c
®
.
c
25 | DE
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