Page 24 - Reliable_System_Solutions

®
HVI conductor light.

Nowadays roof areas of industrial and office buildings are The length of air-termination rods or an arrangement of
often the last installation level. Regardless of the risk of several air-termination rods is selected in such a way that the
possible lightning strikes, pipes e.g. for ventilation systems, protection zone is sufficiently large. If an individual air-
electrical and IT systems are installed on the roof area. All termination rod is used, the protection zone is the area
theses systems have electrical links into the building which formed by the protective angle. If two air-termination rods
allow for inducing partial lightning currents. Isolated air- are used, a tent-shaped protection zone is formed beside the
termination systems prevent partial lightning currents from air-termination rods and between these two air-termination
being induced into buildings where they may interfere with rods. If several air-termination rods are arranged, an entire
or even damage sensitive electrical / electronic equipment. large protection zone is formed below the air-termination
If bare, non-insulated wires of the air-termination system are rods according to the rolling sphere method.
®
directly installed on the roof, the separation distance to The newly developed HVI conductor light, an extension of
electric and metal systems situated underneath the roof area the tried and tested DEHNconductor system, offers various
has to be observed according to the state of the art and to design options for external lightning protection systems.
the current EN 62305-3 lightning protection standard. The There are also connection types of the HVI conductors light
®
separation distance has also to be observed in standard which require no sealing unit for connection to the
residential buildings with steep roofs. Various conductors, equipotential bonding element in the connection area. The
pipes and large metal-coated thermal insulation systems are coupling point at the tripod support has to be effected in a
located close to the air-termination system and down- defined way so that a functional earth conductor is not
conductor so that the problem of proximity arises. required. This allows for easy installation and consequently
Isolated air-termination systems with high-voltage-resistant saves a lot of time.
®
down-conductors, HVI conductors, provide the solution to HVI conductor light
®
this problem.
The air-termination system is installed e.g. conventionally by
means of air-termination rods which are mounted at a GRP
pipe for insulation/electrical isolation from the roof.