Measurement of autocorrelation function and power spectral density of pre-breakdown conduction current pulses in liquid dielectrics

Megahed, I.; Nossier, A

doi:10.1088/0022-3735/2/10/311

Cited by 8 publications

(3 citation statements)

References 6 publications

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“…Also, the amplitudes and repetition rates of the conduction current bursts have been the subject of numerous statistical studies in recent years (Megahed and Nosseir 1969, Nosseir and Megahed 1970, Megahed and Tropper 1971, Nosseir 1973.…”

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confidence: 99%

General hypergeometric systems of equations and series of hypergeometric type

Gel'fand¹,

Граев²,

Retakh³

1992

Russ. Math. Surv.

185

244

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Observations were made of the temporal variations of conduction currents through point-to-sphere and sphere-to-sphere gaps of insulating oil and of n-hexane under high direct voltages. Current bursts were distinguished from the normal fluctuations of the quasi-steady current component. Long-duration bursts were similar to some previous observations, but many short bursts had the polarity opposite to that of the quasi-steady component.

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confidence: 99%

General hypergeometric systems of equations and series of hypergeometric type

Gel'fand¹,

Граев²,

Retakh³

1992

Russ. Math. Surv.

185

244

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“…The impulsive nature of the conduction process in insulating liquids has been the subject of detailed investigations in recent years (Singh et a1 1972, Zaky andHawley 1973), in an attempt to shed fbrther light on the mechanisms of conduction and breakdown in liquid insulants. A number of investigations has been carried out (Megahed and Nosseir 1969, Rhodes and Brignell 1971, Nelson and McGratli 1972, Kao and Rashwan 1974 primarily to study the nature of these pulses and the influence of test conditions on their occurrence and distribution. These investigations have yielded a number of significant results and provided a sensitive indication of some of the physical processes taking place.…”

Section: Introductionmentioning

confidence: 99%

High-field conductivity in liquid paraffin

Megahed¹,

Nosseir²

1975

J. Phys. D: Appl. Phys.

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The paper gives experimental results showing the dependence of conduction currents and current pulses in liquid paraffin on temperature, dissolved gases, aromatic additives and hydrostatic pressure. The results support the theory that a gaseous phase is evolved at some stage in the breakdown of hydrocarbon liquids. The gaseous phase is most likely hydrogen bubbles produced by dissociation of the liquid molecules by energetic electrons.

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“…Previous observations of conduction currents under direct voltages have usually been of their average values and their variations with voltage and with physical conditions (Singh et al 1972). Also, the amplitudes and repetition rates of the conduction current bursts have been the subject of numerous statistical studies in recent years (Megahed and Nosseir 1969, Nosseir and Megahed 1970, Megahed and Tropper 1971, Nosseir 1973.…”

mentioning

confidence: 99%