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Because of the serious consequences if the work is
not done properly, earthing and lightning protection
work may be performed only by specially trained
electricians!
Never perform grounding and lightning
protection work if you are not a specialist with
the appropriate skills!
The instructions printed here are not an
invitation to non-specialists to perform
earthing
and lightning protection work on their own account;
they are meant solely as additional information for
the specialists whom you employ!
Potenzialausgleichsschiene
Netzanschluss
Potenzial-
ausgleichs-
leitung
Potenzialausgleichsschiene
Erdungs-
anschluss
Erdungs-
leitung
Potenzial-
ausgleichs-
leitung
The standard says that
within the hatched area
antenna grounding
is not compulsory.
Antenna earthing/lightning protection
The antenna must be erected to DIN EN 60728-11 and earthed
as speci
fi
ed. Only these antennas are exempt from the earthing
requirement:
– more than 2 m below the edge of the roof
– and at the same time less than 1.5 m from buildings
For earthing, the mast must be connected by means of a suitable
ground conductor to the lightning protection system of the building,
using the shortest route. If no lightning protection system is
available: to the building's earth conductor.
Connection to the lightning protection system may be made only
by a quali
fi
ed lightning protection system installation engineer.
a) Suitable as ground conductors are:
– a single solid wire with a cross-section of at least 16 mm
2
copper, at least 25 mm
2
aluminium or at least 50 mm
2
steel.
b) Unsuitable as ground conductors are:
- the
outer conductor of the antenna cable
-
metallic domestic installations
(such as the metal pipework
of a water or heating system), since the permanence of the
electrical connection cannot be guaranteed
- or
the shielding conductor
or
neutral conductor
of the mains
power supply.
c) Routing of ground conductors
• Antenna cables and earthing conductors must
not
be routed
through rooms used for storing
easily fl ammable substances
(such as hay or straw) or in which an explosive atmosphere
can develop (such as gases, vapours).
• If the parabolic antenna is used in an integrated
antenna
system
(e. g. a distribution system), the grounding measures
must also be designed in such a way that grounding protection
is still maintained if individual units are removed or replaced.
Hazards
may be caused not only by thunderstorms (lightning), but
also by static charges and short circuits in the connected units.
For safety reasons therefore in general for all antenna systems
an equipotential bonding conductor of 4 mm² copper should be
provided.
The cable screens of all coaxial antenna downlink cables must be
connected to the mast with an equipotential bonding conductor.
Equipotential bonding rail
Equipotential bonding rail
Mains connection
Earthing
conductor
Earthing
connector
Equipoten-
tial bonding
cable
Equipoten-
tial bonding
cable
1.5m
