Impulse Breakdown Behavior of Negative Rod-Plane Gaps in SF6-N2, SF6-Air and SF6-C02 Mixtures

Safar, Yousef A.; Malik, N. H.; Qureshi, A. H.

doi:10.1109/tei.1982.298488

Cited by 25 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The characteristics of SF 6 /N 2 , SF 6 /CO 2 and SF 6 /air had been previously studied using a negative impulse (2/50 µs) and measuring the 50% breakdown voltage [21]. It is not surprising that the results are somewhat different from those obtained in this paper.…”

Section: Discussioncontrasting

confidence: 64%

A study of alternative insulating gases to SF₆

Qiu

Chalmers

Coventry

1999

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Impulse breakdown of a point/plane gap in mixtures of SF 6 with selected buffer gases (air, CO 2 and N 2 ) has been studied. It has been found that the minimum impulse breakdown voltage of these SF 6 mixtures can be higher than or comparable with that of pure SF 6 . This finding is discussed in terms of the change of ion mobility and ionization energy in the mixtures. Some degree of immunity from the breakdown initiated by filamentary conducting particles in the system was observed using the mixtures.

show abstract

Section: Discussioncontrasting

confidence: 64%

A study of alternative insulating gases to SF₆

Qiu

Chalmers

Coventry

1999

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…Malik and colleagues reported that the spherical emission regions were observed only for discharges in N 2 /SF 6 gas mixtures and that fine paths with intensive emission, called microleaders, were observed advancing from them [12]. Thus, microleaders would also be expected to be observed in the creeping corona for our N 2 /SF 6 (D = 3%) mixed gas system; however, they could not be observed in this study.…”

Section: Observation Of Creeping Discharge Incontrasting

confidence: 56%

Creeping Flashover Characteristics in (N<sub>2</sub>/SF<sub>6</sub>)Gas Mixture under Pulse Voltage

Watabe

Shinomiya²,

Ueno

et al. 1999

IEEJ Trans. FM

View full text Add to dashboard Cite

“…Most previous studies of gas dielectric breakdown properties have concentrated on room temperature values. [13][14][15][16] For these reasons, it is important to study and better understand the dielectric properties of hot gas mixtures.…”

Section: Introductionmentioning

confidence: 99%

Prediction of the critical reduced electric field strength for carbon dioxide and its mixtures with copper vapor from Boltzmann analysis for a gas temperature range of 300 K to 4000 K at 0.4 MPa

Guo

Zhao

et al. 2015

Journal of Applied Physics

View full text Add to dashboard Cite

The influence of copper vapor mixed in hot CO2 on dielectric breakdown properties of gas mixture at a fixed pressure of 0.4 MPa for a temperature range of 300 K–4000 K is numerically analyzed. First, the equilibrium composition of hot CO2 with different copper fractions is calculated using a method based on mass action law. The next stage is devoted to computing the electron energy distribution functions (EEDF) by solving the two-term Boltzmann equation. The reduced ionization coefficient, the reduced attachment coefficient, and the reduced effective ionization coefficient are then obtained based on the EEDF. Finally, the critical reduced electric field (E/N)cr is obtained. The results indicate that an increasing mole fraction of copper markedly reduces (E/N)cr of the CO2–Cu gas mixtures because of copper's low ionization potential and large ionization cross section. Additionally, the generation of O2 from the thermal dissociation of CO2 contributes to the increase of (E/N)cr of CO2–Cu hot gas mixtures from about 2000 K to 3500 K.

show abstract

Impulse Breakdown Behavior of Negative Rod-Plane Gaps in SF6-N2, SF6-Air and SF6-C02 Mixtures

Cited by 25 publications

References 8 publications

A study of alternative insulating gases to SF₆

A study of alternative insulating gases to SF₆

Creeping Flashover Characteristics in (N<sub>2</sub>/SF<sub>6</sub>)Gas Mixture under Pulse Voltage

Prediction of the critical reduced electric field strength for carbon dioxide and its mixtures with copper vapor from Boltzmann analysis for a gas temperature range of 300 K to 4000 K at 0.4 MPa

Contact Info

Product

Resources

About

Impulse Breakdown Behavior of Negative Rod-Plane Gaps in SF6-N2, SF6-Air and SF6-C02 Mixtures

Cited by 25 publications

References 8 publications

A study of alternative insulating gases to SF6

A study of alternative insulating gases to SF6

Creeping Flashover Characteristics in (N<sub>2</sub>/SF<sub>6</sub>)Gas Mixture under Pulse Voltage

Prediction of the critical reduced electric field strength for carbon dioxide and its mixtures with copper vapor from Boltzmann analysis for a gas temperature range of 300 K to 4000 K at 0.4 MPa

Contact Info

Product

Resources

About

A study of alternative insulating gases to SF₆

A study of alternative insulating gases to SF₆