OBO Bettermann isCon 750 LGR, Инструкции системы

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OBO BETTERMANN 8 | EN
Product description
3 Product description
3 1 Basic principles
Without any additional countermeasures, the high voltage pulses which
occur when there is a direct lightning strike will cause arcing to insula-
tion surfaces. This effect is termed a creep flashover. When the so-called
creep discharge inception voltage has been exceeded, surface discharge
is initiated, which can bridge a gap of several metres. To avoid dangerous
arcing between conductive parts (electrical systems, pipelines, etc.), the
maintenance of the separation distance is a key requirement when plan-
ning and implementing a lightning protection system.
These days, the roof level of building complexes is used as an installa-
tion area for air-conditioning, ventilation, transmission and energy collec-
tion systems, meaning that the structural features may be in the way of
the required spacing between the interception systems and the electrical
installations.
The isCon insulated lightning protection system is used to maintain the
required separation distance. After the first potential connection behind
the connection element on the air-termination rod, the isCon cable re-
flects an equivalent separation distance of up to 0.75 metres in the air or
1.5 metres in solid matter. This means that installation is possible directly
on metallic and electrical structures. If there is a direct lightning strike,
the incoming energy is arrested through the isCon cable to the building's
earthing system. There is no direct arcing between the arrestor and the
building to be protected.
The isCon system has a tested arresting capacity of 150 kA lightning
surge current (10/350 μs). It primarily consists of the following compo-
nents:
– isCon cable
– Insulated interception rods
– System accessories for fastening (interception rod stand, support and
holder)
– System accessories for connection
3 2 isCon cable
The insulated isCon cable is free from surface discharge, is resistant
to high voltages and is ignition-free. According to DIN EN 62305-3/VDE
0185-305-3/IEC 62305-3, it replaces a separation distance of 0.75 metres
in the air and 1.5 metres in the case of solid materials. It is equipped
with an external semi-conductive jacket, allowing it to limit high lightning
voltage pulses against a reference potential, by creating a connection be-
tween the external semi-conductive jacket and the building's equipotential
bonding, which is not energised with lightning current, in the area of the
connection element.
The isCon cable is flame-resistant according to DIN EN 60332-1-2, is
weatherproof, halogen-free and consists of a twisted copper core, sur-
rounded by insulation layers of meshed polyethylene (VPE) and the ag-
ing-resistant material ethylene vinyl acetate (EVA). It is suitable for routing
in external areas and can be routed on roofs, or in walls, in concrete, in
facade installations or in buildings.