Results 221 to 230 of about 18,461 (262)

Low Voltage Impulse Circuits

Physics, 1933
Three different types of low voltage circuits suitable for supplying impulse voltages in oscillographic work are discussed. These circuits use Thyratrons as the connecting and timing switches in place of the spark gaps ordinarily employed in transient investigations. Charged condensers are used as the source of voltage.
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Effects of impulse surge voltages on alternators

2001 IEEE Porto Power Tech Proceedings (Cat. No.01EX502), 2002
We consider the impulse surge voltages acting on alternators running in the block with the elevating transformer. The alternators' insulation is not stable, particularly when the block alternators are placed in more severe conditions because the surge voltage waves coming from the line and through the step-up transformer have a direct effect on them ...
T. Otmane-Cherif, R. Chaibi, N.A. Mufidzada   +2 more
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The effects of impulse voltages on transformer windings

Journal of the Institution of Electrical Engineers, 1937
The effects of the application of impulse voltages of varied wave-shapes to transformers are analysed theoretically and experimentally. Single and multiple transients have been considered, and oscillographic tests have been made on model transformers of different winding characteristics, and on both single-phase and 3-phase transformers.
T.E. Allibone, D.B. McKenzie, F.R. Perry
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Peak-voltage measurements of standard impulse voltage waves

Proceedings of the IEE Part C: Monographs, 1956
The frequency spectrum of a 1/50 microsec impulse wave is obtained by the use of the Fourier transform. The corresponding frequency spectrum of the output from a simple capacitance potential divider, suitable for use up to 300 kV, is calculated from the input frequency spectrum for a 1/50 microsec wave and the frequency response of the divider ...
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The measurement of the magnitude of impulse voltages using voltage comparators

Journal of Physics E: Scientific Instruments, 1971
A digital peak voltmeter is described which determines the unknown voltage by comparing it with each of 100 known constant voltages in turn. Each constant voltage exceeds its predecessor by a fixed amount. Despite the large number of reference voltages employed, only ten comparators are used.
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Measurements on impulse voltages with a ballistic galvanometer

Journal of the Institution of Electrical Engineers - Part II: Power Engineering, 1942
Simple Circuits are described whereby measurements of the crest value and time of duration of the transient voltages used in impulse testing may be made with a ballistic galvanometer. Both methods of measurement have been compared with the results obtained simultaneously by a high-speed cathode-ray oscillograph.
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High-Impulse Current and Voltage Measurement

IEEE Transactions on Instrumentation and Measurement, 1970
This paper is a survey of methods of high-impulse current and voltage measurement. Typically, such measurement techniques must now include capabilities for measuring high-energy impulses having peak powers as high as many megawatts, currents as high as many mega-amperes, or voltages as high as several megavolts, with rise times as short as a fraction ...
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High-Voltage Impulse Converter

2023 International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM), 2023
Dmitriy Sorokin, Sergey Volskiy, Aleksandr Kornev   +2 more
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Effect of wave oscillation on breakdown characteristics of oil-impregnated paper under lightning impulse voltage

Electric Power Systems Research, 2021
Xuanrui Zhang, Xutao Han, Ruochen Guo
exaly  

Partial Discharge Measurement and Analysis of Transformer Under Oscillating Lightning Impulse Voltage

IEEE Transactions on Dielectrics and Electrical Insulation, 2022
Xuanrui Zhang, Xutao Han, Yidan Hu
exaly