Effects of Particle Contamination in Sf6 Cgit Systems and Methods of Particle Control and Elimination

Dale, S.J.; Wootton, R. E.; Cookson, A.H.

doi:10.1016/b978-0-08-025978-9.50032-9

Cited by 20 publications

(11 citation statements)

References 3 publications

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“…E o is the minimum breakdown field for very large electrode area at a particular pressure, dependent only on the gas and pressure: X is a constant dependent on the gas, surface roughness and pressure; m is a constant dependent on the gas, but independent of pressure or surface roughness, being equal to 7.4 for SF 6 . Their results suggested a minimum value of E o independent of surface roughness.…”

Section: Electrode Effectsmentioning

confidence: 99%

“…Usually the first breakdown value can be increased compared with spark conditioning, but the final conditioned values will be less than for the spark-conditioned system. Stress conditioning is now often used in testing practical gas-insulated systems to elevate and move conducting particle contaminants into 'particle traps' where the particles are deactivated [6] (see Section 2.1.4).…”

Section: Conditioning Effectsmentioning

confidence: 99%

“…1 Paschen plot for AC uniform field breakdown in clean SF 6 [2] 0143-702X1811040303 + 10 $01.50/0 minutes to hours). Usually the first breakdown value can be increased compared with spark conditioning, but the final conditioned values will be less than for the spark-conditioned system.…”

Section: Conditioning Effectsmentioning

confidence: 99%

“…In practical systems, particle traps are used to create zero, or very low, fields where the particles are deactivated. A conditioning voltage, usually AC, is used to elevate any particles and move them into the trapping regions [6,17,19,20].…”

Section: Particle Contamination Effectsmentioning

confidence: 99%

“…This review concentrates primarily on the advances since the previous review published in 1970 [1]. Although the Figures are selected for SF 6 systems, for convenience and consistency, the text is intended to be general for all compressed gases.…”

Section: Introductionmentioning

confidence: 99%

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Review of high-voltage gas breakdown and insulators in compressed gas

Cookson

1981

IEE Proc. A Phys. Sci. Meas. Instrum. Manage. Educ. Rev. UK

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In the past ten years there have been significant advances in the theoretical and experimental analysis of high-voltage gas breakdown and surface flashover of insulators in compressed gases. This has probably been fostered by the recent growth in the design and application of gas-insulated high-voltage equipment. The review describes the characteristics of compressed-gas breakdown, including the effects of failure of Paschen's law; conditioning; electrode area; material and surface; breakdown-voltage distribution; particle contamination; voltage waveform; temperature; and gas mixtures. The insulator-flashover characteristics are then described, including the effects of insulator-electrode interface; insulator material; insulator shape; voltage waveform; charge generation; particle contamination; surface contamination; conditioning; flashover distribution; and dependence on type of gas. The various mechanisms proposed for gas breakdown and insulator flashover are reviewed and discussed in relation to the experimental characteristics. Future theoretical and experimental work is suggested to clarify the gas-breakdown and insulator-flashover mechanisms, and which would also help bring about the design of improved high-voltage gas-insulated systems.

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Section: Electrode Effectsmentioning

confidence: 99%

Section: Conditioning Effectsmentioning

confidence: 99%

Section: Conditioning Effectsmentioning

confidence: 99%

Section: Particle Contamination Effectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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