Results 121 to 130 of about 17,847 (159)

A method for calibration of partial discharge calibrators

1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254), 1999
A method for calibration of partial discharge calibrators has been developed based on passive integration of the induced charge. The voltage over a known capacitor is measured by a calibrated digital sampling voltmeter and the charge is calculated as the voltage multiplied by the capacitance.
Ove Gunnarsson, Anders Bergman, Karl-Erik Rydler   +2 more
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Partial discharges in micrometer voids in PTFE

Conference Record of the 1996 IEEE International Symposium on Electrical Insulation, 2002
In this work, a high bandwidth experimental setup is used to measure the inception voltage, the waveform and the apparent charge of partial discharges (PD) in artificial voids in solid insulating materials. The investigations include microvoids, i.e. voids with characteristics dimensions below 100 /spl mu/m. In this paper, the results for PTFE (teflon)
Gaxiola, E.H.R., Wetzer, J.M.
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Dynamical properties of partial-discharge patterns

International Journal of Parallel, Emergent and Distributed Systems, 2017
AbstractIn this paper, Partial Discharge pattern as an indicator of the fault state of insulation systems of medium voltage overhead lines with covered conductors are described, analyzed, and their dynamical properties are researched. Application of data obtained in natural environment with huge variety of noise interferences, affected by various ...
Marek Lampart, Tomás Vantuch, Ivan Zelinka, Stanislav Misák   +3 more
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Partial Discharge Measurement

2014
This chapter is devoted to the measurement of partial discharges (PD) localized in weak spots of dielectrics if subjected to high test voltages. As standards for PD measurement s have been introduced only for quality assurance tests of HV apparatus energized by power frequency AC voltages (50/60 Hz), the following treatment refers mainly to this test ...
Wolfgang Hauschild, Eberhard Lemke
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Electric conduction breakdown and partial discharges in dielectric fluids. I. Partial discharges

[1991] Proceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials, 2002
Some studies have suggested that there may exist a relationship between conduction and electrical breakdown. Before such a correlation between these phenomena and partial discharges (PDs) can be investigated, it is necessary to produce reproducible PD data.
MAZZETTI DI PIETRALATA, Carlo, POMPILI, Massimo, E. O. Forster   +2 more
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Equipment for the Energy Measurement of Partial Discharges

IEEE Transactions on Electrical Insulation, 1983
The energy dissipated by partial discharges (PD) can be estimated from the U i Q i . It has been described a particular device able to deal with such a calculation using a correlator unit. With gas chromatography analysis a satisfactory correlation was available between the degradation products of liquid (oil) or solid (pressboard) insulation and the ...
G. Garcia, B. Fallou
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Partial discharge measurements

2008
[No abstract available]
R. Bartnikas, POMPILI, Massimo
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A PDE-based partial discharge simulator

Journal of Computational Physics, 2017
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Andrea Villa, Luca Barbieri, Marco Gondola, Andres R. Leon-Garzon, Roberto Malgesini   +4 more
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Detection of Partial Discharges at High Frequencies

Proceedings of the 41st International Universities Power Engineering Conference, 2006
This paper details a partial discharge measurement detection model that has been used to produce a test circuit suitable for detection of partial discharge at high frequencies. The circuit is designed to identify partial discharges in different insulating samples stressed by non-standard (including high frequency sine-waves and square waves).
Alrumayan, F., Cotton, I.; id_orcid 0000-0001-7970-6177   +1 more
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Partial discharges and their measurement

2004
The study of partial discharges is not an academic pursuit. It is driven by a very practical desire, a desire to understand a phenomenon which can be utilised to infer the level of integrity within the insulation systems of high voltage plant and which, in itself, constitutes a serious stress degradation mechanism. The role of partial discharge studies
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