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e-Book PDF - Universidad de La Punta (ULP)

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Para la instalación <strong>de</strong> esta infraestructura se realizó,<br />

previamente, el relevamiento, cálculo y diseño <strong>de</strong> la<br />

torre ó mástil a montar. <strong>La</strong> altura <strong>de</strong> cada mástil está<br />

<strong>de</strong>terminada por los cálculos <strong>de</strong> enlaces que son necesarios<br />

montar en esa infraestructura. Con los cálculos<br />

<strong>de</strong> enlaces se <strong>de</strong>termina la altura mínima necesaria<br />

para la instalación <strong>de</strong> un vínculo radioeléctrico y,<br />

tomando la máxima altura necesaria para los enlaces<br />

que se quieren instalar -el caso más crítico- se obtiene<br />

la altura mínima <strong>de</strong>l mástil a montar.<br />

Todas las torres y mástiles instalados tienen un sistema<br />

<strong>de</strong> balizamiento diurno y nocturno, un sistema <strong>de</strong><br />

riendas, pararrayos y puesta a tierra y se comunica<br />

con el shelter, a través <strong>de</strong> un sistema <strong>de</strong> acometida <strong>de</strong><br />

cables (ver figura 11).<br />

A<strong>de</strong>más, cada shelter tiene un sistema <strong>de</strong> puesta a tierra<br />

(PAT) normalizado. El principal objetivo que se persigue<br />

con este sistema es proteger a las personas y a los<br />

equipos frente a los efectos <strong>de</strong> las interferencias electromagnéticas<br />

en las frecuencias comprendidas entre C.C.<br />

y la parte inferior <strong>de</strong> la gama <strong>de</strong> radiofrecuencias.<br />

Figura 11: sistema <strong>de</strong> balizamiento <strong>de</strong> mástil. / Figure 11: Mast beacon system.<br />

<strong>La</strong> PAT <strong>de</strong> cada Shelter está concebida para impedir<br />

o <strong>de</strong>sviar el ingreso <strong>de</strong> la energía electromagnética al<br />

interior, que afectaría al equipamiento instalado.<br />

32 |<br />

Previously, the survey, calculation and <strong>de</strong>sign of the tower or mast<br />

were carried out. The height of each mast is <strong>de</strong>termined by the calculation<br />

of the number of links necessary to mount that infrastructure.<br />

Through the link calculation the minimum height for the installation<br />

of a radioelectric link is <strong>de</strong>termined, and consi<strong>de</strong>ring the maximum<br />

necessary height for the links that are to be installed – the most critical<br />

case – the minimum height of the mast is obtained.<br />

All the towers and masts have a system of diurnal and nocturnal<br />

beacons, a system of reins, a lightning rod and grounding, all communicated<br />

to the shelter ( fig. 11).<br />

Each shelter’s GC is conceived to prevent or to <strong>de</strong>flect electromagnetic<br />

energy from entering the shelter, which would affect the equipment.<br />

A shelter has three grounding networks:<br />

• Shelter grounding<br />

• Mast or Tower grounding<br />

• Lightning Rod grounding<br />

To achieve the equipotentiality of the totality of the installation, necessarily<br />

these three groundings must be interconnected.<br />

Besi<strong>de</strong>s, each shelter has a normalized ground connection system<br />

(GC). The main purpose of this is to protect people and equipment<br />

from the effects of the electromagnetic interferences in the frequencies<br />

comprised between C.C. and the lower part of the radiofrequency<br />

range.

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