Technical data

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Potenzialausgleichsschiene
Netzanschluss
Potenzial-
ausgleichs-
leitung
Potenzialausgleichsschiene
Erdungs-
anschluss
Erdungs-
leitung
Potenzial-
ausgleichs-
leitung
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!
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 specifi 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 qualifi 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.
Grounding
conductor
Grounding
connec-
tion
Equipotential bonding rail
Equipotential bonding rail
Equipotential
bonding cable
Mains connection
230V
Equipoten-
tial bonding
cable
1.5m