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6 4
Note!
Mounting instructions isCon
Installation in potentially explosive areas
The isCon Pro+ conductor is ignition-free and can thus be used in light-
ning protection systems which are to be located in potentially explosive
areas. Here, the isCon
Ex zone 1/2 and 21/22.
If necessary, an appropriate DEKRA test report can be obtained from
your OBO contact.
T he system operator must divide a structure into Ex zones (see IEC
60079-10-1 and 2).
When planning and running a lightning protection system through Ex
zones, the following rules must particularly be taken into account:
• DIN EN 62305-3 – Appendix D – "Additional information for lightning
protection systems for structure in areas with the risk of explosion"
• VDE 0185-305-3 – Supplementary sheet 2 – "Additional information
for special structures"
According to this, planners, craftspeople and testers of lightning protec-
tion systems must meet the following requirements and levels of know-
ledge in potentially explosive areas:
• General principles of explosion protection
• General principles of protection ratings and device labelling
• Technical rules for hazardous substances (TRGS 800,751)
• Technical rules for operational safety (TRBS 2152)
• Testing, maintenance and repair requirements and knowledge of the
appropriate technologies and devices
• Meaning of work permission systems and safe electrical separation of
explosion protection in potentially explosive areas
For Ex systems with Ex zone 2 and 22, supplementary sheet 2 (VDE
0185-305-3, Point 4.3) states that a potentially explosive atmosphere will
only occur in rare, unforeseen circumstances. Therefore, it is possible to
position air-termination units in Ex zones 2 and 22, taking Appendix D in
DIN EN 62305-3 (VDE 0185-305-3) into account.
In the case of installations in potentially explosive areas, you must
connect the isCon
to the equipotential bonding at regular intervals. See "7.8.5 Creating
additional equipotential bonding for isCon Pro+ in potentially explosive
areas" on page 55 for more information.
lightning protection system
®
Pro+ conductor may be run through the areas of
®
Pro+ conductor beyond the potential connection
®
Planning an installation
27 | DE
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