Kathrein CAS 80gr, Руководство пользователя, Страница: 8 / 26

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The standard says that
within the hatched area
antenna grounding is
not compulsory.
Because of the serious consequences if the work
is not done properly, grounding and lightning pro-
tection work may be performed only by specially
trained electricians!
Never perform grounding and lightning protec-
tion work if you are not a specialist with the
appropriate skills!
The instructions printed here are not an invita-
tion 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!
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 sui-
table 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 pipe-
work 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 explo-
sive 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 mea-
sures must also be designed in such a way that groun-
ding 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 con-
ductor.
Mains connection
Equipotential bonding rail
Grounding
connection
Grounding
conductor
Equipoten-
tial bon-
ding cable
230V
Equipoten-
tial bon-
ding cable
Equipotential bonding rail