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Industrial and Commercial Power Systems Technical Conference, 1990. Conference Record. Papers Presented at the 1990 Annual Meeting

Date April 30 1990-May 3 1990

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Displaying Results 1 - 18 of 18
  • Conference Record. Industrial and Commercial Power Systems Technical Conference 1990 (Cat. No.90CH2828-2)

    Publication Year: 1990
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    Freely Available from IEEE
  • Graphical monitoring plus practical experience offers realistic solutions to power disturbances

    Publication Year: 1990, Page(s):100 - 106
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    Diagnosing the causes of modern electrical equipment malfunctions is discussed, emphasizing graphical monitoring and practical experience. Five examples of disturbance studies are given. Examples of both internal and external causes are given View full abstract»

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  • Analysis of harmonic filter unbalance and its implication to capacitor bank stability in a three phase system

    Publication Year: 1990, Page(s):36 - 41
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    The behavior of a harmonic filter when it is unbalanced due to capacitor failure or individual capacitor units out of service is investigated. Formulas are presented for parallel and series resonance frequencies. These formulas are designed to help power engineers understand the behavior of harmonic filters and design harmonic filters more effectively. Analysis results are presented without mathem... View full abstract»

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  • Characteristics and applications of various arc interrupting methods

    Publication Year: 1990, Page(s):79 - 91
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    The author discusses considerations in choosing the most appropriate methods and applications of various arc interrupting devices. Differences in arc interruption by voltage class are examined. Arc interruption history, theory, and design criteria are discussed View full abstract»

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  • Testing required to demonstrate reliability of emergency and standby power equipment

    Publication Year: 1990, Page(s):23 - 29
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    A detailed generalized statistical development of an equipment reliability testing plan is presented and compared with the specific International Electrotechnical Commission's IEC Standard Publication 605-5: `Equipment reliability testing.' Detailed references, discussions, definitions of terms, illustrations, and a case study are presented to provide an understanding of the complex area of demons... View full abstract»

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  • A fast discrete method for voltage drop and current calculation for manufacturing facilities with intermittent loads

    Publication Year: 1990, Page(s):62 - 68
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    A numerical method of calculating voltage drops and thermal current ratings due to a large number of intermittent loads such as welders and robots is presented. The welder and robot loads may have different currents and duty cycles and connect at different points on a distribution network, not necessarily radial. No lumping of welder loads is required. Regular loads such as motor loads and other p... View full abstract»

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  • New NFPA-99 requirements for electrical systems in health care facilities

    Publication Year: 1990, Page(s):107 - 110
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    The 1990 Edition of NFPA-99 Standard for Health Care Facilities was approved by the National Fire Protection Association at its November 13-15, 1989 fall meeting in Seattle, Washington. An analysis of the changes affecting the essential electrical system, with specific consideration of the transfer equipment, is presented. How the new edition can help improve the dependability and proper continuit... View full abstract»

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  • Harmonic and transient overvoltage analyses in arc furnace power systems

    Publication Year: 1990, Page(s):42 - 50
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    Guidelines for analyzing harmonics and transient overvoltages generated by arc furnaces are presented. computer simulation techniques for creating accurate models for the analysis of arc furnace power systems are discussed. Simulation guidelines are outlined in detail to assist the power systems engineer in performing a complete and accurate study of arc furnace power systems. General practices an... View full abstract»

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  • Failure analysis of low voltage power and control circuits

    Publication Year: 1990, Page(s):92 - 99
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    The authors discuss two proven circuit protection techniques-a probability method using a decision tree and a component damage method to predict the weakest circuit component. These methods are applicable to circuits typically found in both fossil and nuclear generating stations and provide simple tools for selecting circuitry arrangements or components. A failure analysis, and calculations are pr... View full abstract»

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  • Power quality requirements of a large industrial user: a case study

    Publication Year: 1990, Page(s):1 - 4
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    An evaluation of the magnitude, duration, and frequency of disturbances as seen by a large industrial plant, the tolerances of sensitive plant equipment to these disturbances, and the effect on plant operation is presented. The study reveals that momentary interruptions, voltage sags, and impulses are detrimental to the plant's operation to varying degrees. The results indicate several cost-effect... View full abstract»

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  • RAM models for fossil generating units

    Publication Year: 1990, Page(s):30 - 35
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    Reliability and maintainability (RAM) modeling methodology for evaluating a fossil generating power unit is discussed. Niagara Mohawk Power Corporation's Huntley Unit 65 is used as an example of how the RAM model can be applied as a practical tool at the plant and corporate levels to improve unit availability. The development, evaluation and validation of the RAM model is outlined. The collection ... View full abstract»

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  • Battery protection-where do we stand?

    Publication Year: 1990, Page(s):69 - 78
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    The author reviews aspects of battery protection devices and standards. The consequences of battery failure, the lack of protection guidelines, fuses in battery circuits, DC versus AC fuse ratings, the behavior of fuses, the circuit time constant, voltage derating of fuses, fuse location and coordination battery condition monitors, and protection philosophy are discussed View full abstract»

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  • Unity Plus motor winding method advantages and disadvantages

    Publication Year: 1990, Page(s):111 - 118
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    The Unity Plus method of winding a motor is presented. The differences between the Wanlass motor winding method and the Unity Plus method are discussed. The difference between power factor correction and efficiency is discussed. The characteristics that influence the efficiency of a motor are listed. The limitations and restrictions that are inherent in a motor, once it is built, and the items tha... View full abstract»

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  • Optimal shunt capacitor sizing for distribution systems with multiple nonlinear loads

    Publication Year: 1990, Page(s):51 - 56
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    A mathematical model is developed and a solution method is presented for reactive power compensation of distribution circuits having nonlinear loads. Both additional power losses and increase in RMS voltages due to harmonic current flows are incorporated in the problem formulation. It is shown that the capacitor sizes and locations when nonlinear loads are present in a system can be quite differen... View full abstract»

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  • Automated bus transfer control for critical industrial processes

    Publication Year: 1990, Page(s):5 - 22
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1284 KB)

    The techniques and methods for maintaining continuous electrical power to petroleum and chemical facilities from two or more utility feeders by an automated bus transfer logic controller system are discussed. The purpose of this system is to reduce transients, torsional forces, inrush currents, and motor stress while maintaining continuous motor operation when the primary utility source experience... View full abstract»

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  • Utility capacitor switching and adjustable speed drives

    Publication Year: 1990, Page(s):119 - 125
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    The circumstances of drives tripped by utility capacitor switching are analyzed using the results of a case study. It is shown that low-loss utility capacitors increase the surge magnitude by decreasing system damping. Surge magnification is possible at lower voltage buses from the capacitor buses. The three conditions for magnification are described. It is shown that drive sensitivity to the surg... View full abstract»

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  • Current calculation methodology for manufacturing facilities with intermittent loads

    Publication Year: 1990, Page(s):57 - 61
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    An analytical method for calculating the thermal current requirement of feeders in manufacturing plants with intermittent loads such as welders and robots is presented. Probabilistic and power distribution network modeling are combined. This analytical method of calculation gives values which agree with results from exact discrete-state-type calculations. Other plant loads such as motors, lighting... View full abstract»

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  • Power quality site survey instrumentation and measurement techniques

    Publication Year: 1990, Page(s):126 - 135
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    The instrumentation and measurement techniques chapter of the proposed IEEE Emerald Book, a recommended practice for conducting site surveys, is summarized. Wiring and grounding measurement techniques and power disturbance monitoring are described. Instrumentation for accomplishing the surveys and longer-term monitoring are also described. For the three types of monitors discussed (event indicator... View full abstract»

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