Results 211 to 220 of about 18,461 (262)
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Review of Scientific Instruments, 1966
An alternative to the Marx circuit for the production of high voltage, high current pulses is developed. It employs a water-immersed spiral-wound stepup transformer to go from a capacitor bank charged to 100 kV to an output of 1 MV. A method for using such a transformer to pulse charge a second capacitor bank efficiently without very tight coupling is ...
David Finkelstein +2 more
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An alternative to the Marx circuit for the production of high voltage, high current pulses is developed. It employs a water-immersed spiral-wound stepup transformer to go from a capacitor bank charged to 100 kV to an output of 1 MV. A method for using such a transformer to pulse charge a second capacitor bank efficiently without very tight coupling is ...
David Finkelstein +2 more
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The Production of Impulse Test Voltages
Transactions of the American Institute of Electrical Engineers, 1935In performing surge tests on electrical power apparatus to determine ability to withstanding lightning or switching surges, the shape of the impulse voltage wave should be approximately the same as 1 of the 3 test wave shapes commonly in use. Methods of producing a wave shape having the prescribed time constants are described in this paper, and ...
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Standardization of impulse-voltage testing
Journal of the Institution of Electrical Engineers, 1936Following a brief resume of available information on the wave-shapes of surges on transmission lines, the wave-shapes of impulse voltages generated in the laboratory are denned and recommendations are made for the standardization of wave-shapes in order to facilitate the comparison of results obtained in different laboratories.
T.E. Allibone, F.R. Perry
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1934
An outline of the technique of making impulse voltage measurements by cathode ray oscillograph is given. Circuits for operating, timing and synchronizing of oscillograph and impulse generator are discussed. Certain details of the technique of operating an oscillograph and of impulse testing are also mentioned. The results of experimental determination
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An outline of the technique of making impulse voltage measurements by cathode ray oscillograph is given. Circuits for operating, timing and synchronizing of oscillograph and impulse generator are discussed. Certain details of the technique of operating an oscillograph and of impulse testing are also mentioned. The results of experimental determination
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2019
In power supply networks for the transmission and distribution of electrical energy at high voltage, transient voltages of more than 1 MV can occur due to lightning or switching operations. Because of their high magnitudes and short rise times, ranging from a fraction of a microsecond to milliseconds, the overvoltages cause enhanced stress on the ...
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In power supply networks for the transmission and distribution of electrical energy at high voltage, transient voltages of more than 1 MV can occur due to lightning or switching operations. Because of their high magnitudes and short rise times, ranging from a fraction of a microsecond to milliseconds, the overvoltages cause enhanced stress on the ...
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Some recent developments in impulse-voltage testing
Electrical Engineering, 1940Impulse-voltage testing of electrical apparatus and circuits is a steadily growing practice and constant attention is therefore being given to improvements in testing methods. Accordingly, as progress is made it is necessary to describe recent changes.
C. M. Foust, N. Rohats
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Measurement of High-Voltage Impulses
2013For conventional measurement of lightning, switching, chopped and oscillating impulse voltages, measuring systems with high-voltage dividers up to several megavolts have been employed for decades. They are classified as resistive, capacitive and resistive-capacitive voltage dividers.
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Electroluminescence in polyethylene terephthalate (PET) (impulse voltage)
Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1981, 1981Electroluminescence was observed in PET when an impulse voltage was applied. The electroluminescence depended on the electrode material of the cathode and showed only a weak temperature dependence and a superlinear dependence on the electric field. The spectrum of the electroluminescence was identical with that of the photoluminescence originating from
Kenzo Kojima +2 more
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Polypropylene foil response to voltage impulses
2018 19th International Scientific Conference on Electric Power Engineering (EPE), 2018Electrical insulating materials used in the electric power engineering are exposed to various overvoltage phenomena during operation. Effects of voltage impulses with various front time on the breakdown voltage of the biaxially oriented polypropylene foil were studied.
Bystrik Dolnik, Lukas Kruzelak
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Measuring transmission-line impulse voltages
Electrical Engineering, 1954THREE companion papers describe impulse tests performed on the experimental transmission lines of the American Gas and Electric Company.1–3 When these tests were being planned, it was necessary to select voltage dividers capable of reducing the high-surge voltages to a level suitable for measurement by a cathode-ray oscillograph. Selecting dividers for
S. B. Griscom +2 more
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