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Daily radiation records are used to optimally dimension array and battery sizes in stand-alone photovoltaic systems and to determine array orientation. The resulting system design has the specified power availability at minimum total cost.
With growing amount of telecom equipment exchanged by world trade the need for safety standards accepted all over the world is becoming urgent. Specific safety requirements have been set up by national telephone administrations and some national standardization bodies. The fields of telecom equipment, data-processing and office machines are growing together. For the last two fields international requirements...
This paper presents an overview of the trends in telecommunication system power unit design and improvements to be incorporated into these designs in the future. The need for better power unit component materials and reliability, the advantages of increasing switching frequency and higher rates of forced-air cooling are discussed.
Applying Microprocessors to the power plant produces many good effects, such as smaller size and lighter weight eqipment, easy maintenance, economy improvements. For these reasons, NTT is going forward with the introduction of microprocessors to its various power eqipment units and systems. This paper discusses the background of today's expanding use of microprocessors, basic application concept,...
During the latest 5 - 10 years of time as a result of the energy crises in the early 70:ies great interest has been focused on the development of alternative power sources all over the world. Both large scale alternative power systems and small scale systems for powering telecommunications equipment have been developed, tested and put into operation. The interest for small scale systems is not only...
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