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Because of the serious consequences if the work
is not done properly, grounding 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
grounding 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 grounding/lightning protection
The antenna must be erected to DIN EN 60728-11 and grounded
as speci
fi
ed. The grounding requirement is inapplicable only to
those antennas:
– more than 2 m below the edge of the roof
– and at the same time less than 1.5 m from buildings.
For grounding, 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 ground 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 grounding 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
230 V
Grounding
conductor
Grounding
connection
Equipoten-
tial bonding
cable
Equipoten-
tial bonding
cable
1.5m
