Calculation of Sparking Potentials of SF6 and SF6-GAS Mixtures in Uniform and Non-Uniform Electric Fields

Nema, R.S.; Kulkarni, Sunil Jayant; Husain, E.

doi:10.1109/tei.1982.298572

Cited by 12 publications

(5 citation statements)

References 11 publications

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“…The measurements [1][2][3]6] indicate that the breakdown voltage of a mixture containing an electronegative gas is related to its breakdown voltage. The available data also show that any correlation between the mixture proportion and breakdown voltage obtained from measurements at a [4,7]. In the present case the measurements are available in coaxial cylinders only; U is therefore calculated from R.…”

Section: Analysis and Resultsmentioning

confidence: 63%

“…With some limitations Eq. (1) has however been applied earlier quite successfully in dc and power frequency ac breakdowns [4] over a wide range of pd.…”

Section: Discussionmentioning

confidence: 99%

“…Quite a few studies [2,3] are available reporting the static breakdown voltages of these gases and gas mixtures in uniform and non-uniform filed conditions for different mixture ratios tested at different pressures. As before, we have analyzed the data of [1][2][3]6] and shown that the NKH formula developed by us earlier [4] can be applied to these gases and their mixtures to predict the breakdown voltages and thus putting the measured data in a handy form so that it is useful to practicing engineers.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On Calculation of Breakdown Voltages of Mixtures of Electron Attaching Gases

Nema

Kulkarni

Husain

1982

IEEE Trans. Elect. Insul.

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Section: Analysis and Resultsmentioning

confidence: 63%

“…With some limitations Eq. (1) has however been applied earlier quite successfully in dc and power frequency ac breakdowns [4] over a wide range of pd.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On Calculation of Breakdown Voltages of Mixtures of Electron Attaching Gases

Nema

Kulkarni

Husain

1982

IEEE Trans. Elect. Insul.

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“…Since the electric field is nonuniform, the multiplication of SF6 pressure and distance between the selected points is calculated within the range of 50 ≤ pd ≤ 1200 for the simulations. Figure 2 shows the breakdown voltages of SF6 gas with respect to the multiplication of pressure and electrode gap in kPa cm [19].…”

Section: Definition Of the Sf6 Gas-insulated Transformer (Git) Modelmentioning

confidence: 99%

“…Figure 2 shows the breakdown voltages of SF6 gas with respect to the multiplication of pressure and electrode gap in kPa cm [19].…”

Section: Definition Of the Sf6 Gas-insulated Transformer (Git) Modelmentioning

confidence: 99%

SF6 gas-insulated 50-kVA distribution transformer design

Özgönenel¹,

Thomas²,

Kurt³

2018

Turk J Elec Eng & Comp Sci

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There are increasing environmental concerns such that governments are pressured to cooperate with international concurrences. One of the most harmful contaminants is mineral oil when it infiltrates the soil. Although it is a good material in the act of insulating in distribution/power transformers, it presents some environmental hazards and safety disadvantages. For this reason, gas-insulated transformers are considered particularly for hazardous locations. An oilinsulated distribution transformer of 50 kVA, 34.5/0.4 kV, and 50 Hz is investigated and converted to SF6 gas-insulated transformer in this study. The suggested distribution transformer model with SF6 insulated has many benefits, such as being explosion-proof and light, with a compact design. Therefore, the new design provides a safer transformation for security risk environments such as nuclear power plants, mines, and submarines. The prototype is more compact and proposes lighter designs between 25% and 55% as compared to conventional oil-insulated transformers. COMSOL is used for modeling and breakdown optimization studies.

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Common parametrizations of electron transport, collision cross section, and dielectric strength data for binary gas mixtures

Brunt

1987

Journal of Applied Physics

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Previously used parametrizations of dielectric strengths (electrical breakdown data) for gas mixtures in terms of electron collision and transport parameters are reviewed. A new method of fitting experimental data on dielectric strengths for binary electronegative gas mixtures is proposed based upon the principal assumption that the electron kinetic energy distributions in the gas are Maxwellian. The method provides physical insight into such behavior as pressure-dependent or pressure-independent synergisms, and is useful in checking the consistency between dielectric strength data and available information on electron transport and ionization, attachment, and momentum transfer collision cross sections. The method is applied here to the mixtures SF6/N2, CCl2F2/N2, and SF6/CCl2F2.

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Calculation of Sparking Potentials of SF6 and SF6-GAS Mixtures in Uniform and Non-Uniform Electric Fields

Cited by 12 publications

References 11 publications

On Calculation of Breakdown Voltages of Mixtures of Electron Attaching Gases

On Calculation of Breakdown Voltages of Mixtures of Electron Attaching Gases

SF6 gas-insulated 50-kVA distribution transformer design

Common parametrizations of electron transport, collision cross section, and dielectric strength data for binary gas mixtures

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