Page 3 - dehn-protects-cell-sites-ds104-e

High availability and
reliability

With the explosive growth in mobile terminal devices the
utilisation of mobile networks and the global demand for
bandwidth is increasing. The transfer from the UMTS to
the LTE standard, the fourth generation of mobile commu-
nications, is globally promoted. This will allow providers to
offer data services, thus making the mobile Internet a mass
market.

In mobile communications, high availability and reliability
of equipment and system technology is paramount; not
only in the private but also in the public sector, for example
in digital radio systems of security authorities. Therefore,
lightning protection systems for cell sites are indispensable.
When configuring the network infrastructure and planning
new sites, planners, installers and operators must take light-
ning and surge protection measures. This is also required by
insurance companies and experts.
Lightning and surge protection measures are selected and
arranged according to the lightning protection zone concept
as per IEC 62305. This standard defines protection zones.
At the edges of that zones, different coordinated protection
elements are used.
A lightning protection system provides optimal protection
by coordinating the
• External lightning protection system consisting of air-
termination system, down conductor, earth-termination
system and the
• Internal lightning protection system consisting of light-
ning equipotential bonding and surge protective devices.
A protection concept consisting of an external and internal
lightning protection system ensures the availability of cell
sites.

3