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A thermoelectric generator has been developed especially for the low power consumption radio equipment now being used to provide communication systems in developing areas. The new generator uses the same thermoelectric converter as used in Global's propane fueled Model 5120 which has proven high reliability and long life as established from seven years of field service throughout the world. However...
This paper considers the reliability of several ring generator systems. The mean-time-between-failure (MTBF) is developed for a generalized system. This equation is applied to three specific cases.
A Call Progress System generating telephone calling tones and ringing power with a high degree of flexibility is described. It has a multi-microcomputer architecture and is personalized for a particular application by use of a ROM.
To meet the increasing demands of international telecommunications in Japan, 32-storied building (KDD Building) was constructed in Tokyo in 1974. In order to feed power to the telecommunication equipments, the constant voltage and constant frequency uninterruptible power plant of 4000 kVA which will meet the demand of power consumption required for the future increase of telecommunication equipments...
Wind energy is receiving a great deal of focused attention concerning its technical feasibility, its competitive cost for electric power generation and other applications and its minimal environmental impact. Wind energy technology, both commercially available and cost competitive, has been used extensively to provide electric power in remote areas where access to a central grid is too difficult and...
The use of standby generators as peak shaving devices pays dividends in several ways. The practice of using the generators as peak shavers reduces the demand rate, eliminates the need to "test" the generator periodically, utilizes the fuel in a time frame which prevents contamination and better utilizes the capital investment. This paper discusses the methodology used to accomplish this.
System design methods of primary power supply systems using a wind turbine are given at first, compared with various primary power supply systems. Then, a design method for spoiler flaps in the Darrieus wind turbine is given. Last, the tested power supply system, using a wind turbine and a diesel generator, is introduced.
Solar voltaic power systems are critically looked at from a user's point of view. A circuit configuration regarded suitable for use in powering radio link equipment is described. Early failure mechanisms of solar modules are listed and major requirements for solar cell encapsulation are given. A statement is ventured as to equipment reliability of a solar system. Careful selection, sizing and maintenance...
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...
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