Bedienungsanleitung Kathrein cas 90 (Seite 18 von 36) (Deutsch, Englisch)

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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 speciﬁ 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 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

copper, at least 25 mm

aluminium or at least 50 mm

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

Mains connection

Earthing

conductor

Earthing

connector

Equipoten-

tial bonding

cable

Equipoten-

tial bonding

cable

1.5m

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