Results 251 to 260 of about 80,385 (313)
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Partial discharge. VIII. PD testing of solid dielectric cable
IEEE Electrical Insulation Magazine, 1991For pt.VII see ibid., vol.7, no.4, p.9 (1991). The development of solid dielectric cable is discussed and its potential defects are described. Limitations to partial discharge (PD) measurement and testing are discussed, and its use for detecting cavities (also referred to as voids), which are probably the most common defect in solid dielectric cable ...
J.C. Chan +3 more
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Joint time-frequency analysis for partial discharge (PD) signal extraction
2018 12th International Conference on the Properties and Applications of Dielectric Materials (ICPADM), 2018The joint time-frequency analysis has been recently applied to PD signal extraction. Its advantage is widely considered to be the capability of analyzing signals in time and frequency domains at multiple scales. This paper presents a study on recent advances in the application of joint time-frequency analysis techniques to extract PD signal from noise.
Hui Ma +3 more
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Partial discharge. VI: PD testing of printed circuit boards
IEEE Electrical Insulation Magazine, 1991For pt.V see ibid., vol.7, no.2, p.28 et seq. (1991). The results of a research program concerned with applying partial-discharge (PD) testing to the nondestructive evaluation of the dielectric characteristics of coated printed circuit board (PCB) systems that must meet the high-voltage dielectric test requirements of low-voltage equipment are reported.
H. Koch +3 more
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Analysis of Internal Partial Discharge Based on PD Current Waveform
2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2008The analysis of partial discharge (PD) phenomenon to cause long-term degradation of electrical insulation systems is essential to development of electrical insulation technology. The PD pattern on the relation between PD magnitude and the phase of applied voltage is well known one of the electrical insulation diagnosis methods for high voltage ...
Kenji Nanao +2 more
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IEEE Electrical Insulation Magazine, 1992
For pt.XIV see ibid., vol.8, no.5, p.34 (1992). The effects of X-ray irradiation during partial discharge measurements are discussed. The partial discharge phenomena in cavities is detailed. A full-scale system capable of testing 138-kV-class post insulators under combined electric stress and X-ray radiation was implemented.
N. Fujimoto, S. Rizzetto, J.-M. Braun
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For pt.XIV see ibid., vol.8, no.5, p.34 (1992). The effects of X-ray irradiation during partial discharge measurements are discussed. The partial discharge phenomena in cavities is detailed. A full-scale system capable of testing 138-kV-class post insulators under combined electric stress and X-ray radiation was implemented.
N. Fujimoto, S. Rizzetto, J.-M. Braun
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2016 Biennial International Conference on Power and Energy Systems: Towards Sustainable Energy (PESTSE), 2016
In high voltage (HV) electrical power systems; varieties of materials (solid, liquid and gaseous) are used for insulation purpose to protect the early failure in High Voltage power equipment. Most of insulating materials are not perfect in all respect and contain some impurities.
Devendra Gowda, null Anandraj
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In high voltage (HV) electrical power systems; varieties of materials (solid, liquid and gaseous) are used for insulation purpose to protect the early failure in High Voltage power equipment. Most of insulating materials are not perfect in all respect and contain some impurities.
Devendra Gowda, null Anandraj
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Partial discharge. IX. PD in gas-insulated substations-fundamental considerations
IEEE Electrical Insulation Magazine, 1991For pt.VIII see ibid., vol.7, no.5, p.9 et seq. (1991). The physical aspects of partial discharge (PD) in SF/sub 6/ gas-insulated substations (GIS) are reviewed. The orientation is toward present and developing techniques for evaluating defects in solid and gaseous insulation systems on the basis of PD measurement.
R. Baumgartner +3 more
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The correlation between partial discharges (PD) and gassing in insulating liquids
10th International Conference on Conduction and Breakdown in Dielectric Liquids, 2002The authors report on investigations performed to determine the relationship between PD parameters and the dissolved gas generated by partial discharges in mineral-based oil. The PD activity of mineral-based oil is shown to depend upon many parameters, including the influence of the standing time between the filling of the test vessel and the switching
H. Borsi, U. Schroder
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Partial discharges in HV machines; initial considerations for a PD specification
IEE Proceedings A Science, Measurement and Technology, 1993Partial discharge (PD) specifications exist for all types of electrical equipment except motors and generators. Whereas specifications essentially require that the equipment is discharge-free the stator conductor bar insulation of the motors and generators under consideration is micaceous and has excellent PD resistance.
J.W. Wood +4 more
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Partial discharge (PD) measuring techniques
15th IET International School on High Voltage Engineering and Testing 2008, 2008The physical background of partial discharges will be explained on simple models. The requirements on the complete partial discharge measuring systems including the calibration and evaluation of the measuring results will be discussed and examples of partial discharge measurements on transformers in the laboratory and on site will be presented. Finally
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