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Telecommunications Energy Conference, 1982. INTELEC 1982. International

Date 3-6 Oct. 1982

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Displaying Results 1 - 25 of 93
  • International Telecommunications Energy Conference

    Publication Year: 1982, Page(s): i
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  • Copyright page

    Publication Year: 1982, Page(s): ii
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  • Greetings!

    Publication Year: 1982, Page(s): iii
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  • 1982 Intelec Management Committee

    Publication Year: 1982, Page(s): iv
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  • Intelec Advisory Committee

    Publication Year: 1982, Page(s): v
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  • Conference Executive Committee

    Publication Year: 1982, Page(s): v
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  • Technical Program Committee

    Publication Year: 1982, Page(s): vi
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  • [Acknowledgements]

    Publication Year: 1982
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  • Table of contents

    Publication Year: 1982, Page(s):vii - xi
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  • Technology Trends in Power Devices

    Publication Year: 1982, Page(s):1 - 5
    Cited by:  Papers (1)
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    At switching powers below 10 kVA the classical bipolar devices are attacked by MOSFETs. Their main advantages are higher switching speed and less expensive drive circuits. In the power range up to 100 kVA large bipolar transistors with votlages of 400 - 1000 V are of growing interest. On the other hand, asymmetric thyristors (ASCR) and gate turn-off thyristors (GTO) can also reduce weight and volu... View full abstract»

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  • Power for Digital Sets and Terminals

    Publication Year: 1982, Page(s):6 - 8
    Cited by:  Papers (1)
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  • Fiber Optic Communications in Japan

    Publication Year: 1982, Page(s):9 - 15
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    Latest technology and application field of fiber optic communications systems in Japan are introduced. Very low loss fibers made by the vapour phase axial deposition (VAD) method, mode stabilized laser diodes (LD) for single mode fibers (SMF) and wavelength division multiplexing (WDM) filters are latest topics of optical devices. Inter-office trunk systems by using graded index (GI) multi-mode fib... View full abstract»

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  • International Telecommunications Energy Conference Washington - October 1982; Future Trends in Switching

    Publication Year: 1982, Page(s):16 - 19
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    The communications environment is changing more rapidly than ever before. Technical advance within communications systems is only one factor. Almost more important is the advance in electronic and computer-based systems in office and home, which will increasingly demand intercommunication. Although telephony still dominates, switching engineers find themselves facing the need to switch a widening ... View full abstract»

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  • Coordination and Harmonization in the Field of Power Supply for Telecommunication Equipment

    Publication Year: 1982, Page(s):20 - 22
    Cited by:  Papers (2)
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  • Zero Energy Growth - Can We Continue to Achieve it?

    Publication Year: 1982, Page(s):23 - 27
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (744 KB)

    For eight consecutive years since 1973, the Bell System has met its objective of zero energy growth. During this period the volume of business has grown by 86 percent and the cumulative savings in energy are equivalent to 37 million barrels of oil. Most of the savings to date have been made by improving building operations; however, substantial and growing savings have accrued from the introductio... View full abstract»

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  • The Quality of U.S. Commercial AC Power

    Publication Year: 1982, Page(s):28 - 33
    Cited by:  Papers (45)
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    From May 1977 through September 1979, the Bell System conducted a study of commercial ac power disturbances ¿ To determine their nature and extent ¿ To devise statistical ways of predicting their occurrence ¿ To reduce or eliminate computer downtime through selection of appropriate, cost-effective power-conditioning equipment for use throughout the System. For a total of 270 months, field data ... View full abstract»

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  • AC Service Protection in Unattended ESS Telephone Equipment Buildings

    Publication Year: 1982, Page(s):34 - 37
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    Unattended ESS telephone equipment buildings present different considerations than those presented by the older electromechanical Central Dial Offices. The planning and design of the AC service protection system in these buildings is now directed toward the building environment and ancillary mini-microcomputers as well as the exchange switching equipment. This paper describes the equipments, circu... View full abstract»

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  • What'S New in the UPS Field?

    Publication Year: 1982, Page(s):38 - 41
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    The electronic processing market is a rapidly growing market, the number of main frame computers as well as mini and micro computers is ever increasing. Since sensitivity of all types of computers to interruptions in the power supply has not decreased, it remains a must to ensure an Uninterrupted Power Supply. The UPS requirement is increasing in the area of industrial electronic plant e.g. contro... View full abstract»

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  • A Utility Interactive PWM Sine-Wave Inverter Configured as a High Efficiency UPS

    Publication Year: 1982, Page(s):42 - 48
    Cited by:  Papers (12)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (641 KB)

    Conventional UPS equipment employs a tandem charger, battery, and inverter to isolate critical loads from utility disturbances and failures. Since two distinct stages of power conversion -- charger and inverter -- are required, this method is both inefficient and expensive. This paper describes a new circuit topology and operating method that uses a single four-quadrant PWM sine-wave inverter to b... View full abstract»

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  • Switched Mode P.W.M. DC/AC-Inverter for Uninterruptible 50 Hz AC Power Supply

    Publication Year: 1982, Page(s):49 - 54
    Cited by:  Papers (2)
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    The availability of modern computer controlled telecommunication systems can be vitally improved by applying uninterruptible AC power supply. The most important AC provided devices are rotating memories, printers and similar data processing equipment. In contrast to previously applied large central DC/AC-inverters new circuit designs allow creation of very compact dedicated units. Due to its small... View full abstract»

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  • Powering the Office of the Future

    Publication Year: 1982, Page(s):55 - 60
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    The office of the future will rely on a series of complex Data Processing Systems. Included within the office's equipment needs will be such things as Word Processors, Electronic Mail Systems, and other interactive computer based office support systems. In many cases, the information being handled by these systems may be of an extremely critical nature and the possibility of data loss due to a pow... View full abstract»

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  • Off Line UPS for Computer Power Applications

    Publication Year: 1982, Page(s):61 - 64
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    Critical computer power applications require some form of UPS protection. Achieving very high reliability from the UPS while keeping equipment and operating cost to a minimum is the main goal of all UPS designers. This paper addresses a new inverter design which permits the solid-state UPS to remain in an off-line mode and only operate during a utility power failure. The paper traces the redevelop... View full abstract»

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  • The Energy Wheel in Operation

    Publication Year: 1982, Page(s):65 - 68
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    The kinetic energy storage has stepped from an initial development status to an operational phase on prototypes. The first energy wheel has been implemented as an uninterruptible power supply unit for a rural telephone exchange, close to Paris. This paper draws the 1st conclusions after one year of operational experience. At first thle operatirng principles and performance of the model are recalle... View full abstract»

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  • Evaluation of Solar Photovoltaic Power Systems

    Publication Year: 1982, Page(s):69 - 72
    Cited by:  Papers (1)
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    This paper describes a method of measuring and recording solar radiation data in a suitable form for the design of solar photovoltaic power systems. A prototype instrument has been developed which could be located at prospective sites for the collection of solar radiation data. A similar instrument is also being developed to evaluate the performance of photovoltaic power systems by integrating arr... View full abstract»

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  • Power Systems for Earth Stations in the Amazon Jungle

    Publication Year: 1982, Page(s):73 - 80
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    The present work describes the main problems- and their corresponding solutions - in the implementation of Energy Systems for Earth Stations in the Amazon Region. It analyses initially the potential choices of Energy Systems in order to conclude on the best alternative to be adopted in view of several parameters, including the individual and adverse conditions of the Region. After deciding to use ... View full abstract»

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