OBO BETTERMANN
24 | EN
Planning an installation
Figure 14:
At least two isCon arresters for lightning protection class I
4 4
Installation in potentially explosive areas
The isCon cable is ignition-free and can thus be used in lightning protec-
tion systems, which are to be located in potentially explosive areas. Here,
the isCon cable may be run through the areas of Ex zone 1/2 and 21/22.
If necessary, an appropriate DEKRA test report can be obtained from
your OBO contact.
Note!
The 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 knowl-
edge in potentially explosive areas:
• General principles of explosion protection
• General principles of protection ratings and device labelling
• 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 an Ex atmosphere will only occur in
rare, unforeseen circumstances. Therefore, it is possible to position
interception systems 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 con-
nect the isCon cable beyond the potential connection to the equipotential
bonding at regular intervals. See Page 13 for more information.
Summary of Contents for isCon 750 LGR
Page 1: ...03 2014 EN isCon System instructions...
Page 65: ...System instructions OBO isCon EN 65 Own notes...
Page 66: ...OBO BETTERMANN 66 EN...
Page 67: ......
