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Electrical Insulation Magazine, IEEE

Issue 3 • Date May-June 1998

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Displaying Results 1 - 13 of 13
  • Mineral insulating oil in transformers

    Publication Year: 1998 , Page(s): 6 - 16
    Cited by:  Papers (42)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1392 KB)  

    Nearly all load bearing transformers in electric power delivery systems around the world are filled with liquid. The liquid functions both as an electrical insulation and as a heat transfer fluid. The liquid in almost all of these units is transformer oil, petroleum-based insulating oil refined specifically to meet the requirements of this application. Transformers in electric power distribution and transmission systems are expected to function reliably and efficiently and to do this for many years. The quality of the oil in a transformer plays an important role in performing this function, and the characteristics of transformer oil have been examined and reported on for decades. This article discusses some of these characteristics and the relationships between these characteristics and the production and in-service performance of mineral transformer oil. Transformer oil is used around the world, but the emphasis here is on practices in the United States. View full abstract»

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  • Application of the 3D boundary element method in the design of EHV GIS components

    Publication Year: 1998 , Page(s): 17 - 22
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1044 KB)  

    The main purpose of numerical field calculation in high voltage engineering is the optimization of the electrode shape of dielectrically stressed components. In the design of gas-insulated switchgear (GIS) components, several conflicting requirements must be satisfied simultaneously in order to ensure success. For example, a design must be compact in order to reduce material costs and to allow for modular, cost-effective layouts. At the same time, the electric field stresses on the active components must be low enough to ensure reliability and compliance with international standards (IEC, ANSI, etc.) for the voltage. This challenge, although not new to GIS design, has intensified in recent years as competition in the market has driven down prices and placed cost pressure on manufacturers. This new tool changes our design process in that no more repeated HV tests and multiple prototypes are necessary. View full abstract»

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  • Fourier transform infrared (FT-IR) spectrometry to detect additives and contaminants in insulating oils

    Publication Year: 1998 , Page(s): 23 - 29
    Cited by:  Papers (3)  |  Patents (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (626 KB)  

    Over the past ten years, the development of IR has evolved dramatically with the development of analog to digital converters, signal treatment, dedicated computers, etc. This paper shows that FT-IR is useful for the detection of additives or undesirable impurities at low content (<100 ppm) without preliminary extraction by using a spectra accumulation technique combined with a spectra subtraction technique in conjunction with a collection of pure compound spectra as a database. The detection limit in comparison to classical IR analysis is reduced by approximately a factor of seven by an improvement of the signal-to-noise ratio. View full abstract»

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  • Annual Book of ASTM Standards. Vol. 10.03 Electrical Insulating Liquids And Gases; Electrical Protective Equipment [Book Reviews]

    Publication Year: 1998 , Page(s): 42
    Save to Project icon | Request Permissions | PDF file iconPDF (145 KB)  
    Freely Available from IEEE
  • Electric Power Engineering, 2nd Ed. [Book Reviews]

    Publication Year: 1998 , Page(s): 42
    Save to Project icon | Request Permissions | PDF file iconPDF (145 KB)  
    Freely Available from IEEE
  • Electronics Quality Management Handbook [Book Reviews]

    Publication Year: 1998 , Page(s): 42
    Save to Project icon | Request Permissions | PDF file iconPDF (145 KB)  
    Freely Available from IEEE
  • Electrostatics: Exploring, Controlling, and Using Satic Electricity, 2nd Ed. [Book Reviews]

    Publication Year: 1998 , Page(s): 42
    Save to Project icon | Request Permissions | PDF file iconPDF (145 KB)  
    Freely Available from IEEE
  • Physics And Chemistry Of Low-Dimensional Inorganic Conductors [Book Reviews]

    Publication Year: 1998 , Page(s): 43
    Save to Project icon | Request Permissions | PDF file iconPDF (144 KB)  
    Freely Available from IEEE
  • Introductory Digital Electronics [Book Reviews]

    Publication Year: 1998 , Page(s): 43
    Save to Project icon | Request Permissions | PDF file iconPDF (144 KB)  
    Freely Available from IEEE
  • Pocket Guide To Technical Writing [Book Reviews]

    Publication Year: 1998 , Page(s): 43
    Save to Project icon | Request Permissions | PDF file iconPDF (144 KB)  
    Freely Available from IEEE
  • Six-Figure Consulting-How To Have A Great Second Career [Book Reviews]

    Publication Year: 1998 , Page(s): 43
    Save to Project icon | Request Permissions | PDF file iconPDF (144 KB)  
    Freely Available from IEEE
  • Surface Analysis - The Principal Techniques [Book Reviews]

    Publication Year: 1998 , Page(s): 43 - 46
    Save to Project icon | Request Permissions | PDF file iconPDF (310 KB)  
    Freely Available from IEEE
  • Why Things Are The Way They Are [Book Reviews]

    Publication Year: 1998 , Page(s): 46
    Save to Project icon | Request Permissions | PDF file iconPDF (179 KB)  
    Freely Available from IEEE

Aims & Scope

The EI Magazine is specifically concerned with publishing articles in the development and characterization of the dielectric, chemical, mechanical, and environmental properties of all vacuum, gaseous, liquid, and solid electrical insulation, and with utilization of these materials in circuits and systems under conditions of use.

Full Aims & Scope

Meet Our Editors

Co-Editor-in-Chief
Edward Cherney

Co-Editor-in-Chief
Robert Fleming