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System instructions OBO isCon
4 4
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.
Note!
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 structures 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 in
potentially explosive areas of explosion protection
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
equipotential bonding at regular intervals. See "6.6.5 Creating additional
equipotential bonding for isCon Pro+ in potentially explosive areas" on
page 56 for more information.
lightning protection
®
Pro+ conductor may be run through the areas of
®
Pro+ conductor beyond the potential connection to the
®
Planning an installation
EN | 25
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