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Throughout the World, the requirements for automonous power supplies for telecommunication purposes are many and varied. This paper outlines the criteria to be considered when selecting power plants and identifies two major fields of application. Modular design of Plant and its installation in environmentally hostile conditions is considered and the affect of climate on power systems indicated. Design...
A methodology for determining the benefits of protected ac power systems for computers is presented based upon considerations of power line disturbances, economic impact of computer outages and costs of implementing and operating the power systems. All relevant expenses are combined to compute life cycle costs and payback periods for alternative protected ac power systems.
Methods are examined for saving energy costs through the management of energy systems typical of telephone buildings; namely, the AC reserve plants. Analysis indicates reduced electric utility costs may be realized by using the AC reserve plant for peak shaving.
In the spring of 1978 the trade press carried a story about a small radio relay station in the North African desert titled "The Night Provides Coolness in the Heat of the Desert Sun". The sensational news was that, for the first time ever, electronic communication equipments housed in an insulated, 1, 3 m3 shelter were cooled by a cooling system that uses no energy and operates without pumps...
Telettra, a private company of the FIAT group operating in telecommunications, designed and is about to finish the installation of a high capacity, line-of-sight radio link over the Red Sea, i.e. between Saudi Arabia and Sudan. The study, design and construction of long over-sea's microwave links have been a traditional part of Telettra's activity for the last 25 years. The design in question is based...
An ever-growing number of loads are placing more exacting demands on the power supply. The use of standby systems is recommended or even essential for all such exacting demands. Static UPS systems have acquired a leading position compared to other standby systems and will consolidate it still further in future. The most important characteristics of modern static UPS systems are dealt with and A comparison...
Future trends within the industry are considered, and recent developments in batteries are reviewed, including improved lead acid designs, sodium sulphur and advanced primary batteries. By the very nature of the reliability and long service life requirements, technological change and the introduction of new battery types is a slow process. Apart from certain emergency power systems that require particularly...
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