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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 82
  • International Telephone Energy Conference

    Publication Year: 1978, Page(s): i
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  • Copyright page

    Publication Year: 1978, Page(s): ii
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  • Greetings!

    Publication Year: 1978, Page(s): iii
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  • Schedule of Activities

    Publication Year: 1978, Page(s): iv
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  • 1978 Intelec Management Committee

    Publication Year: 1978, Page(s): v
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  • Intelec Advisory Committee

    Publication Year: 1978, Page(s): v
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  • Technical Program Committee

    Publication Year: 1978, Page(s): vi
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  • Acknowledgements

    Publication Year: 1978, Page(s): vi
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  • Table of contents

    Publication Year: 1978, Page(s):1 - 4
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  • Power Supply for Telecommunications Systems in the Federal Republik Germany

    Publication Year: 1978, Page(s):1 - 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5562 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
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7014 KB)

    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 DC fields. Flexibility in planning and 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
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    The Swedish Telecommunications Administration, Televerket, is a state-owned public utility and - running as a monopoly - it is responsible for installation, ownership and operation of telephone, telex, data and radio communication in Sweden. After more than 100 years existence the telephone network in Sweden now offers fully automatic dialling for every subscriber and the country has the second hi... View full abstract»

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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 ring... View full abstract»

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  • Power Equipments General Design in the French Telecommunications Network

    Publication Year: 1978, Page(s):30 - 37
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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
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (8620 KB)

    Experience to date shows that solar photovoltaic power generators can provide cost-competitive power supplies for a growing number of telecommunication applications in isolated areas. The continuing downward trend in solar-module prices is important to users, but the young solar industry must be aware that a marked improvement in reliability and service life of solar modules is generally required. View full abstract»

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  • PDF Not Yet Available In IEEE Xplore

    Publication Year: 1978, Page(s): 1
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  • PDF Not Yet Available In IEEE Xplore

    Publication Year: 1978, Page(s): 1
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  • System Consideration of Triports

    Publication Year: 1978, Page(s):46 - 49
    Cited by:  Papers (7)
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    The general characteristics of a new power processing circuit called the Triport1 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:  Papers (14)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7723 KB)

    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 - A New Approach to UPS

    Publication Year: 1978, Page(s):59 - 65
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5906 KB)

    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 no... View full abstract»

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  • High Frequency DC Triport, An Uninterruptable Power System

    Publication Year: 1978, Page(s):66 - 70
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3442 KB)

    The High Frequency (HF) DC Triport is a new power supply concept intended for applications requiring uninterruptable 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
    Cited by:  Papers (3)
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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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    The paper deals with the development of a reliable, cost effective wind power system designed specifically for extended operation at unmanned sites. The system examined is a hybrid vertical axis turbine used to power a directly coupled, low speed alternator. A description of this system in relation to both a pure Darrius system and horizontal axis systems is provided. The paper covers the last fou... View full abstract»

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  • British Post Office Standard Packaged Standby Generators

    Publication Year: 1978, Page(s):85 - 91
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6179 KB)

    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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