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Telephone Energy conference, 1978. INTELEC 78. International

Date 25-27 Oct. 1978

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Displaying Results 1 - 25 of 67
  • Intelec International Telephone Energy Conference

    Publication Year: 1978, Page(s):i - x
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    Freely Available from IEEE
  • Author index

    Publication Year: 1978, Page(s): 0_2
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    Freely Available from IEEE
  • Power Supply for Telecommunications Systems in the Federal Republik Germany

    Publication Year: 1978, Page(s):1 - 5
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (785 KB)

    In the past the progressive development of telecommunications systems has influenced the power supply which has become of great importance today. The planning and realization of the power supply depends on the requirements of the telecommunications equipment and operation. In the Federal Republik of Germany the main point is the central no-break 60 V dc power supply. At modern electronic telecommu... View full abstract»

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  • The State of the Art of Telecommunications Power Plants in Japan

    Publication Year: 1978, Page(s):6 - 10
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    Various power supply systems for NTT gigantic communication network which involves the world second largest number of telephone sets are described. As for the standard telecommunications power supply in Japan, -48 volts DC is used for switching systems, while -21 volts DC for carrier and radio communication systems and 200 volts AC for data communication systems. However, they are gradually forced... View full abstract»

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  • State of the Art of Telecommunications Power in the UK

    Publication Year: 1978, Page(s):11 - 17
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    Telecommunications equipment in the UK is supplied from a central, standard and modular power plant. Reliability and security is therefore regarded as of prime importance. The paper describes the current approach to modular plant both in the AC and IE fields. Flexibility in planning sad installation is achieved, capital costs are minimised and maintenance charges are reduced. The impact of electro... View full abstract»

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  • State of the Art of Telecommunications Power in Sweden

    Publication Year: 1978, Page(s):18 - 23
    Cited by:  Papers (1)
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  • Power Apparatus in the U. S. Telephone Industry

    Publication Year: 1978, Page(s):24 - 29
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    A survey of power systems and apparatus now used in U. S. telephone systems, both Bell and non-Bell, Operating features of large dc plants are reviewed and differences between Bell and non- Bell practices are noted. The characteristics of some typical rectifiers and power supplies are listed. Dc to dc converters in general use are compared with 20 kHz designs recently introduced. The history of ri... View full abstract»

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  • Power Equipments General Design in the French Telecommunications Network

    Publication Year: 1978, Page(s):30 - 37
    Cited by:  Papers (1)
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    The French telephone system, like in many other countries, is currently in a state of considerable technical development, mainly owing to the introduction of new electronic telecommunication technology. As a result, the exclusive use of semiconductor components has led to the creation of new power units and in particular a centralized power source of an original design, which, in combination with ... View full abstract»

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  • Solar Power for Telecommunications

    Publication Year: 1978, Page(s):38 - 45
    Cited by:  Papers (1)
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  • System Consideration of Triports

    Publication Year: 1978, Page(s):46 - 49
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    The general characteristics of a new power processing circuit called the Triport/sup 1/ are described. The Triport is classified into ac and dc types and its relation to other power processing circuits is established. System arrangements of dc and ac Triports are outlined and comparisons drawn with conventional systems. Finally, some brief comments on discrete Triports are given. View full abstract»

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  • Ac Triport - a New Uninterruptible Ac Power Supply

    Publication Year: 1978, Page(s):50 - 58
    Cited by:  Patents (5)
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    A single-phase, 5.6 kVA ac triport has been developed to serve as an uninterruptible power supply (UPS) for use with critical ac loads. The triport's unique feature is its parallel processing of commercial ac line power and of power derived from a central office battery through a continuously operating inverter. The triport is more efficient, more reliable, and less costly than the traditional ser... View full abstract»

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  • A 15 kVA, three-phase triport is - a new approach to UPS

    Publication Year: 1978, Page(s):59 - 65
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    A 15 kVA, three-phase triport is being developed for minicomputer applications requiring three-phase- protected ac power where the source of standby power is a 48 volt battery. The chief advantage of this approach over a conventional UPS is much higher overall efficiency under normal operating conditions when commercial ac is available. An efficiency of 90 percent is achieved under conditions of n... View full abstract»

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  • High Frequency Dc Triport , an Uninterruptable Power System

    Publication Year: 1978, Page(s):66 - 70
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    The High Frequency (HF) DC Triport is a new power supply concept intended for applications requiring uninterruptible regulated DC energy. The HF DC Triport conditions and transmits energy to a load from two independent energy sources, the commercial AC line and a battery. The HF DC Triport is an alternative power supply arrangement to a conventional rectifier-battery system. The advantages of this... View full abstract»

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  • Stirling-Cycle Thermomechanical Power Sources for Remote or Inaccessible Communications Sites

    Publication Year: 1978, Page(s):71 - 78
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    The paper deals with primary power sources for remote or inaccessible installations, requiring continuous power of tens or hundreds of watts electrical. It is shown that the relatively high conversion efficiency from heat to electricity which is provided by the Stirling-cycle TMG can reduce the weight of fuel required at the site to about a quarter of the weight of equivalent primary batteries, wi... View full abstract»

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  • Licus reliable Power at Remote Sites via the Wind

    Publication Year: 1978, Page(s):79 - 84
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  • British Post Office Standard Packaged Standby Generators

    Publication Year: 1978, Page(s):85 - 91
    Cited by:  Papers (4)
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    Since 1960 the British Post Office has been installing standby a.c. generator sets in all but the smallest rural exchanges. As part of this program a series of packaged engine-alternator sets, complete with mechanical accessories and tanks for fuel, lubricating oil and water, have been developed. About one third of our present 3000 installed engine-sets are of this packaged type. View full abstract»

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  • A 90 Kw Vertical Turbine Alternator

    Publication Year: 1978, Page(s):92 - 97
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  • Ac Reserve Energy Systems - Performance During Blackouts

    Publication Year: 1978, Page(s):98 - 103
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (439 KB)

    A study of 314 AC reserve power plants in Bell System offices involved in 5 major blackouts in 1977-1978, revealed only 2 plant failures resulting in loss of telephone service for a 0.6% failure rate. There were, however, a total of 51 plants experiencing troubles which required operator action to correct. The proliferation of telecommunications equipment in unattended locations with an increasing... View full abstract»

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  • Photovoltaic Power for Telecommunications

    Publication Year: 1978, Page(s):104 - 109
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  • Solar Electrical Systems for Communication

    Publication Year: 1978, Page(s):110 - 113
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    Two important factors in the future development of modern society are telecommunications and energy. The availability of these two will determine the rate of development of a country. The current and future communication systems depend on cables, fiber optics, microwaves, satellites, etc., but their common factor is the need of electrical energy. This paper deals with the use of solar electrical s... View full abstract»

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  • System Design and Economic Analysis of a Solar Photovoltiac Power Supply

    Publication Year: 1978, Page(s):114 - 120
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    Much has been written and continues to be on alternative energy sources in our soon to be energy-short world. One of the alternatives being 'kicked' around in this respect, is photovoltiac power generation using silicon solar cells. With all the seeming euphoric, treatment that these and other 'new energy sources' receive in the press and elsewhere, it is considered apposite at this time to review... View full abstract»

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  • Regulation and Control of Solar Array Power a Minimum Power Dissipation Approach

    Publication Year: 1978, Page(s):121 - 127
    Cited by:  Patents (1)
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    Two approaches to a full-shunt regulator for regulation and control of solar array output power are described in this paper. The first approach, Linear-Partial-Shunt regulation, reduces the power dissipated in the shunt regulator to less than one shunt of the power dissipated in a fullshunt regulator. The second approach, Linear-Sequential-Partial-Shunt regulation, reduces the power dissipation to... View full abstract»

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  • Transductors - Have They A-Future?

    Publication Year: 1978, Page(s):128 - 134
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    Introduction of new technologies has frequently led to the downfall and even disappearance of earlier technologies, particularly when the new technology has gained widespread acceptance and approval, as is the case with Thyristors. Following an initial decline, however, use of Transductors in place of Thyristors for telecommunications charger control is continuing and, in some areas, expanding. Tr... View full abstract»

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  • Current Trends in Pbx Power Supplies

    Publication Year: 1978, Page(s):135 - 139
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    The PBX market in the past few years has been a dynamic one in regards to the introduction of new products having new technology and is expected to continue in the future. This will have a major influence on the power supply designs. This paper will discuss in a general way the trends taking place today in power supply design to meet the changing PBX requirements and the trends in design which are... View full abstract»

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  • A Switched Mode Power Supply for the Pulse Epabx

    Publication Year: 1978, Page(s):140 - 143
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (219 KB)

    The Pulse EPABX was introduced by Northern Telecom about six years ago, and since then 13,000 have been sold all over the world. The utilization of the Switched Mode Power Supply technology resulted in the reduction of power consumption through improved efficiency. At the same time, the volume and weight of the power system was reduced by half; thus a substantial cost reduction in labour and mater... View full abstract»

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