Results 171 to 180 of about 436 (218)
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Partial discharge measurements -- frequency related considerations
CEIDP '05. 2005 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2005., 2005Partial discharge (PD) test circuits have been developed for various test series in different gases in the 13.3 Pa to 101.3 kPa pressure range with a needle-plane electrode arrangement. (The purpose of the test series is to establish results in terms of PD inception voltage, waveforms and rise times.) The paper describes features of the initial and ...
X. Liu +5 more
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Partial discharge measuring technique
2001The partial discharge measurement is a typical non-destructive test and it can be used to judge the insulation performance at the beginning of its service time taking into account the reduction of the performance during the service time by the ageing whereby the ageing depends on numerous parameters like electrical stress, thermal stress and mechanical
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Basics of Partial Discharge Measurement
2019Partial discharge (PD) denotes a small, localized electrical discharge in the insulation between conductors, occurring when the local electric field strength exceeds a critical value. Prolonged exposure to partial discharges is known to degrade the dielectric behavior of the insulation and may even lead to complete breakdown. PD testing of high-voltage
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Partial discharge measurements: possibilities and limitations
[1992] Proceedings of the 4th International Conference on Conduction and Breakdown in Solid Dielectrics, 2003Several aspects of partial discharge (PD) measurement and processing of PD data are discussed. It is pointed out that the ABC equivalent is not a fully valid equivalent of a void in the insulation and should be used with some care. The use of broadband measuring systems gives a gain in sensitivity, but calibration can be a problem when they are used on
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Advances in Measuring Partial Discharge in Insulating Liquids
2019 IEEE 20th International Conference on Dielectric Liquids (ICDL), 2019The IEC 61294 Technical Report, published in 1993, describes a simple test procedure to measure the PD Inception Voltage (PDIV) in insulating liquids and doesn’t cover any other items related to the PD patterns and their evolution at higher voltages. This simplified approach should be considered superseded when taking into account the several studies ...
Calcara, L. +5 more
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Partial-discharge measurements for insulation quality
Power Engineering Journal, 1992There is one common factor that, in different forms, runs throughout the entire electrical and electronics industries. That factor is the requirement for insulation that gives the necessary mechanical, thermal and electrical properties needed for particular applications.
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Equipment for the Energy Measurement of Partial Discharges
IEEE Transactions on Electrical Insulation, 1983The 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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Practical Partial Discharge Measurement on Electrical Equipment
2023Practical Partial Discharge Measurement on Electrical Equipment Accessible reference dealing with (partial discharge) PD measurement in all types of high voltage equipment using modern digital PD detectors Practical Partial Discharge Measurement on Electrical Equipment is a timely update in the field of partial discharges (PD), covering both holistic ...
Stone G. C. +3 more
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Measuring the endurance of films in partial discharges
IEEE Transactions on Electrical Insulation, 1993A new test assembly for measuring the endurance of polymeric and ceramic films under the action of partial discharges (PDs) is presented. If experiments are performed under controlled ambient conditions (i.e., relative humidity), the test procedure gives times to breakdown which show low scatter. The effects of different test conditions on the times to
R. Bozzo +2 more
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A minicomputer-based partial discharge measurement system
1978 IEEE International Conference on Electrical Insulation, 1978In order to make a comprehensive study of partial discharge phenomena, an advanced measurement system has been developed, which utilizes a minicomputer having functions such as memory, data processing and judgement. The system is so designed to process positive and negative pulse trains appearing in phase of a.c.
Toshikatsu Tanaka, Tatsuki Okamoto
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