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Power Apparatus and Systems, IEEE Transactions on

Issue 9 • Date Sept. 1967

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Displaying Results 1 - 21 of 21
  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Publication Year: 1967 , Page(s): c1
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  • IEEE Power Group

    Publication Year: 1967 , Page(s): c2
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  • Proposed Changes in the Constitution and Bylaws of the Power Group

    Publication Year: 1967 , Page(s): 1a - 4a
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  • Design Stresses and Current Ratings of Impregnated Paper Insulated Cables for HV DC

    Publication Year: 1967 , Page(s): 1029 - 1036
    Cited by:  Papers (3)
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    An investigation into the designs and current ratings of oil impregnated paper insulated cables for various direct voltage ratings and impulse withstand levels is described. Published information on the temperature and stress coefficients of resistivity is reviewed. Methods of calculation of the stress distribution are outlined. With the aid of a digital computer, data including the maximum screen stress at various maximum conductor temperatures have been obtained for a range of conductor sizes. View full abstract»

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  • Glass-Reinforced Epoxy-Resin Pipe for Pipe-Type Cable

    Publication Year: 1967 , Page(s): 1037 - 1041
    Cited by:  Papers (2)
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    Cable engineers have recognized for many years that losses which occur in the steel pipe of pipe cable systems appreciably increase ac resistance and greatly reduce possible ampacity of such systems. Nonmagnetic pipes did not offer a practical solution to the problem since available materials contributed essentially the same degree of loss to the system as steel pipes. Hence, from time to time, engineers have focused their attention on nonmetallic pipes as a means of reducing losses. This work shows that one of three plastic pipes examined by the authors effectively stopped the entrance of moisture and caused no deterioration of the cable or pipe oil. Therefore, from a technical standpoint, it provided an effective enclosure for pipe cable. However, the cost of such pipes is still too high to make them economically feasible. View full abstract»

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  • Underground Distribution Thermal Tests in the Phoenix Area

    Publication Year: 1967 , Page(s): 1042 - 1051
    Cited by:  Papers (1)
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    This paper summarizes the results of an 18-month thermal test program conducted jointly by the Arizona Public Service Company and the General Electric Company to investigate thermal characteristics of soil and performance of underground equipment in the Phoenix area. The results presented include earth ambient temperatures at various depths over an annual cycle, earth thermal resistivity measurements by steady-state and transient methods, performance of direct burial and vault installation of capacitors, performance of a directly buried, 25-kVA, pole-type distribution transformer, and temperature rise of simulated cables. View full abstract»

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  • Lightning Protection of Underground Residential Distribution Circuits

    Publication Year: 1967 , Page(s): 1052 - 1056
    Cited by:  Papers (5)
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    General studies have been made on the analog computer to determine the maximum permissible cable lengths with which equipment can be protected by lightning arresters at only the line-cable junction. This paper presents arrester application tables derived from the computer results and directed to underground residential distribution systems. View full abstract»

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  • The Effect of Test and Abnormal System Voltages on Transformer Insulation

    Publication Year: 1967 , Page(s): 1057 - 1065
    Cited by:  Papers (6)
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    In service, a transformer will be subjected throughout its life to three different types of voltages. These are: power frequency, switching surge, and impulse voltages. Recent computer studies and field investigations of EHV systems have provided data on the magnitudes and durations of these voltages. Laboratory tests and factory tests of transformer insulator structures have provided new data on performance. Impulse test levels have been defined for many years. Modern lightning arresters can be selected to provide adequate protection against switching surges. View full abstract»

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  • Determination of Thermal Life Expectancy of Overhead Distribution Transformers

    Publication Year: 1967 , Page(s): 1066 - 1072
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    The calculated thermal life expectancy of distribution transformers is used by the Southern California Edison Company as part of an evaluation program to develop a comparative basis for the economic purchase of annual transformer requirements. The test procedure utilized in accelerating the thermal aging of the transformers, the pre-test measurements, the test measurements, and the mathematical derivation of the transformer aging rate as demonstrated by its performance on the accelerated test are described. In addition to the test procedure, a simulated residential loading schedule has been developed and is used to calculate the expected life of each test transformer. A tabulation is used to demonstrate how the calculations are made and to provide a comparison of the life expectancy of two typical transformers. View full abstract»

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  • Relation of AC Losses to Hysteresis Losses in Electric Sheet Steels

    Publication Year: 1967 , Page(s): 1072 - 1077
    Cited by:  Papers (3)
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    The application of dimensional analysis to measurements made on cold rolled electrical steels yields empirical equations relating ac core losses to hysteresis losses and other factors. As frequency increases from low values, three different patterns of loss variation occur because of increasing skin effect. Loss measurements indicate that samples with lower hysteresis losses and thinner gauges have relatively larger magnetic domains. The hysteresis losses of well-annealed samples are found to depend primarily on grain sizes and orientations. The steels investigated have only incidental amounts of grain orientation. View full abstract»

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  • Numerical Analysis of Hysteresis and Eddy Current Losses in Solid Cylindrical Rods of No. 1010 Steel

    Publication Year: 1967 , Page(s): 1077 - 1083
    Cited by:  Papers (12)
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    A procedure is given which utilizes the digital computer to solve eddy current loss and hysteresis loss problems. The relationship between flux density and magnetic intensity is taken from the actual magnetization curve and major hysteresis loop, thus eliminating the approximations employed in most previous investigations. The nonlinear partial differential equations are replaced by finite difference equations and solved by numerical methods on an IBM 7090 digital computer. View full abstract»

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  • 500-kV Line Design: I - Insulation Characteristics of Towers

    Publication Year: 1967 , Page(s): 1083 - 1090
    Cited by:  Papers (2)
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    The results of tests using a full-scale transmission line for the insulation design of the first 500-kV transmission line in Japan (the Boso Line of Tokyo Electric Power Company) are described. Having clarified the switching surge and impulse flashover characteristics of V-string insulator and strain insulator assemblies, installed on a simulated tower with a long gap of three meters or more, insulation was designed which withstands a switching surge of 2.5 per unit and is capable of unbalanced insulation between vertically arranged double circuits. The flashover path, predischarge, etc., of the switching surge was also investigated. View full abstract»

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  • 500-kV Line Design: II - Corona and RIV Characteristics of Insulator-Hardware Assemblies

    Publication Year: 1967 , Page(s): 1091 - 1097
    Cited by:  Papers (1)
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    This paper describes the corona noise characteristics of insulator-hardware assemblies in the Boso Power Transmission Line of Tokyo Electric Power Company which is the first 500-kV transmission line in Japan. The results of corona noise measurement made on a V-string insulator assembly and a strain insulator assembly are reported. Data on the corona noise level of insulator hardware obtained from a test line were converted into noise level values for an actual transmission line for comparison with the conductor corona noise levels. The design of the insulator hardware was decided accordingly. View full abstract»

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  • Arc Resistance and Application of FRP to Arms in Overhead Power-Line Towers

    Publication Year: 1967 , Page(s): 1098 - 1102
    Cited by:  Papers (4)
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    Concerning the application of insulation arms to overhead transmission structures, some tests on the arc-resistance nature of insulating materials have been performed mainly by means of a plasma jet generator. Several materials were exposed to the plasma flame and the state of the surface degeneration was examined. From the results, the relation between arc resistivity and the chemical structure of materials has been clarified to some extent. This fundamental information yields some excellent fiber glass reinforced plastics (FRP) under actual arc discharge. The insulation arms made of improved FRP have been used successfully on actual overhead line towers as a tension crossarm member to compensate for the lack of clearance. View full abstract»

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  • Pyrolysis of Stator Coil Insulation in Air and Hydrogen

    Publication Year: 1967 , Page(s): 1102 - 1106
    Cited by:  Papers (1)
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    The study of changing properties of generator stator coil insulation on long-time exposure at elevated temperature is an accepted part of insulation development. This aging, however, has usually been done in air, while the windings of modem turbine generators operate in hydrogen atmosphere. Samples of synthetic resin bonded insulation were pyrolyzed in air and hydrogen at 200°C and one atmosphere. The gaseous, liquid, and residual products were analyzed by chromatography and infrared spectroscopy. Heated in air, the gases contained C3, C4, and C5 straight chain hydrocarbons, but the products in hydrogen contained, in addition, cyclohexane. The liquid and residual products indicate the sample pyrolyzed in air degrades by depolymerization and oxidation, while the sample in hydrogen depolymerizes, followed by some degree of hydrogenation. View full abstract»

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  • New Power Cable Insulations Based on Covulcanized Blends of Ethylene Propylene Rubber and Polyethylene

    Publication Year: 1967 , Page(s): 1106 - 1117
    Cited by:  Papers (1)
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    New power cable insulations based on covulcanized blends of ethylene propylene rubber (EPR) and polyethylene (PE) have been developed. These heat-, water-, ozone-, and highly corona-resistant insulations combine many of the desirable properties of both ethylene propylene rubber and polyethylene. Specific constructions of low-voltage, heat and moisture resistant power cables, aerial spacer cables, and portable power cables are reviewed and compared with existing constructions. It is felt that, compared to rubber insulated cables, the use of these new insulations can result in smaller diameter cables which exhibit many improved properties over thermoplastic or cross-linked polyethylene cables. View full abstract»

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  • Thermal Characteristics of Two Types of Concrete Conduit Installations

    Publication Year: 1967 , Page(s): 1117 - 1124
    Cited by:  Papers (3)
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    A field installation of two different types of underground duct banks was made. They differed only in the spacing between the ducts and in the amount of concrete used in their thermal circuits. Identical loading was applied to each duct bank and studies were made of thermal gradients around them as determined by thermocouples. Differences in their thermal capabilities were shown to be due to different degrees of drying in soil or concrete in close proximity to the loaded ducts. Possible corrective measures to obtain better thermal conditions and a method of calculating thermal capabilities are presented, using previously published equations. View full abstract»

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  • New Techniques in the Termination of High-Voltage Power Cable

    Publication Year: 1967 , Page(s): 1125 - 1128
    Cited by:  Papers (1)
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    The advent and expanding use of synthetic polymer-insulated high-voltage power cable has created a need for improved means for terminating this type of cable. The characteristics of synthetic polymer insulation permit the use of new techniques and materials which make it possible to design cable accessories with significant improvements in installation convenience as well as in functional characteristics. Specific devices for terminating polymer- insulated cable employing such new materials and techniques are described in detail. View full abstract»

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  • A New Termination for Underground Distribution

    Publication Year: 1967 , Page(s): 1129 - 1135
    Cited by:  Papers (5)
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    A new principle for stress control on cable terminations has been devised. A tape having a nonlinear voltage-current characteristic is wrapped on the exposed cable end. The resistance of this tape varies with stress in such a manner that the stress along it tends to equalize. View full abstract»

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  • Contributors

    Publication Year: 1967 , Page(s): 1136 - 1139
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  • Blank Page

    Publication Year: 1967 , Page(s): 1139a
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Aims & Scope

This Transactions ceased production in 1985. The current retitled publication is IEEE Transactions on Energy Conversion and IEEE Transactions on Power Delivery, and IEEE Transactions on Power Systems.

Full Aims & Scope