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IEEE Industry Applications Magazine

Issue 4 • Date Jul/Aug 1996

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Displaying Results 1 - 9 of 9
  • Switch off your office equipment and save money

    Publication Year: 1996, Page(s):17 - 24
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1920 KB)

    Although technological innovation will improve the efficiency of electronic data processing (EDP) equipment, energy will be wasted if EDP equipment is left running when it is not being used. Newsham and Tiller (1992) presented data that established that there are long periods during both night and day when desktop computers are switched on but not used, and that significant energy consumption and ... View full abstract»

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  • Electrical hot working safety program

    Publication Year: 1996, Page(s):66 - 70
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (948 KB)

    An internal review of the safety practices for a large Canadian chemical plant indicated that the established procedures for electrical hot work needed to be expanded and formalized. Here, the authors describe how the practices were expanded into a comprehensive electrical hot work program that included a philosophy, controls, qualifications, and safe work methods. The program resulted in changes ... View full abstract»

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  • Distribution reliability: what is it?

    Publication Year: 1996, Page(s):32 - 37
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1612 KB)

    Distribution reliability is a topic that has received attention because distribution reliability performance directly affects customers. In this age of fierce competition, everyone wants to have their company in the top quartile of utilities in terms of distribution reliability performance. The key to reaching the top quartile is understanding distribution reliability; answering the following ques... View full abstract»

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  • Computerized DC (battery) load flow calculations

    Publication Year: 1996, Page(s):53 - 56
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    The key to properly sizing cables, overcurrent devices, and batteries is correctly calculating load current. The load current for constant-power devices increases as voltage decreases. The opposite is true for constant-resistive devices. If the effects of voltage are neglected, the designer can over-design circuits for constant-resistance loads and under-design circuits for constant-power loads. T... View full abstract»

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  • Suggested practices for reducing animal-caused outages

    Publication Year: 1996, Page(s):25 - 31
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (876 KB)

    Power quality is a major issue for electric utilities today. Sensitive electronic equipment and computers are a part of daily life, and consumers are increasingly critical of service interruptions. In many cases, outages and nuisance recloser operations are the result of animal contacts somewhere on the system. Although animal-caused outages have been a fact of life for electric utilities since th... View full abstract»

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  • Power system grounding. II. RCD and GFCI

    Publication Year: 1996, Page(s):71 - 73
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    This article continues a series of historical articles on power system grounding. This part presents a technological overview of the residual current device (RCD) and ground fault circuit interrupter (GFCI) power system protection devices View full abstract»

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  • PM motors for direct driving optical telescope

    Publication Year: 1996, Page(s):10 - 16
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1364 KB)

    This article details the task of developing the drive systems for VLT (Very Large Telescope) control. The project entails the realization and the coordinated operation of four 8 m diameter optical telescopes in Chile for the period 1995-1998. A direct drive system has been chosen as the optimal drive solution from a performance standpoint. It consists of a segmental dual axial air gap brushless mo... View full abstract»

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  • Reactive power demand of transformers with DC bias

    Publication Year: 1996, Page(s):45 - 52
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3404 KB)

    It has been observed that the presence of DC bias currents/fluxes in power transformers generates harmonic currents and voltages with an associated increase in reactive power (kVAr) demand resulting in a voltage drop. Such DC biases can occur: in transformers near high-voltage DC (HVDC) terminals; due to imperfect or half-controlled rectification resulting in DC, even and odd harmonics; because of... View full abstract»

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  • Single-phase voltage regulators and three-phase systems

    Publication Year: 1996, Page(s):38 - 44
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1544 KB)

    Voltage regulators are applied on distribution systems to control the voltage delivered to customers within acceptable industry standards. Concerns about the quality of electric power delivered to customers by electric utility companies have raised the level of awareness of high- and low-voltage conditions at customer facilities. Normally occurring voltage drops through lines and transformers vary... View full abstract»

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Aims & Scope

IEEE Industry Applications Magazine publishes articles concerning technical subjects and professional activities that are within the Scope of the IEEE Industry Applications Society (IAS) and are of interest to society members

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Editor-in-Chief
H. Landis "Lanny" Floyd
 

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