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Valmet Corporation has manufactured diesel generating sets as various configurations over 40 years and it is one of the field's largest manufacturer in Scandinavia. In the 1980's Valmet developed a new series of diesel generating sets called Series V as well as compact power plants which has brought new potential for standby power. As an indication of innovation a patent has been issued for this new...
The end of useful battery life is normally deflated as the point at which battery capacity has reduced ca. 20 % from the nominal value. This aging is typically taken into account by multiplying the back-up time value by a factor of 1.25. The effect of capacity reduction on back-up time depends, however, on the lenght of the discharge time. If the discharge time is in the order of hours, then the 20...
Telecommunications services are increasingly dependent on the quality and reliability of telecommunications power systems. As a result, the need for profitable operation of the power systems has increased. For this purpose, ALICE (advanced power plants integrated maintenance control system) has been developed to accommodate wide-area maintenance, interface with various power systems, and system configuration...
After a description of the common elements of the two decentralized power stations, GEODE and ALFATEL, designed and used by FRANCE TELECOM for its own power needs, this paper gives the main characteristics of each one about reliability, modular design and their control and management network. The paper ends with the range of equipment and their state of settling in FRANCE TELECOM network with the...
The evolution of telecommunications in the USA and its impact on CO Powering architectures is reviewed in two time eras: prior to divestiture of AT&T in 1984 and ten years after divestiture. A possible scenario for the next ten years is also presented. Advances in technology together with competition has spurred the introduction of digital electronics, fiber and wireless to create telecommunications...
The Hungarian Telecom Company wants to invest a lot into the new telephone exchanges in the future. Of course, the new exchanges require also new power systems. It is very important to assure the conditions of the high-quality power supplies. The technical requirements should be worked out, new types of the equipment should be examined and the right maintenance should be organised.
Growing competition in the telecom market is exercising a downward pressure on prices for all types of network services. A high degree of cost consciousness in all network operation sectors is therefore essential. Our basic concern in the field of telecom energy (power supply, heating, ventilation and cooling) is the creation of a complete energy system designed to serve the telecom process. Rapidly...
Telecomms Power and Building Engineering Services (BES) plant has come a long way since the 1930's. On the DC side, equipment has developed from on site generation of DC power, to distributed switch mode power supplies. AC standby plant has progressed from zero provision to fully automated packaged engine sets, and ventilation requirements have advanced from openable windows, to temperature controlled...
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