Electrical Breakdown Studies of Sf6/Co2/Fluorocarbon Mixtures

Cookson, A.H.; Mastroianni, Martin J.

doi:10.1016/b978-0-08-025978-9.50022-6

Cited by 13 publications

(4 citation statements)

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“…In addition, only the experiments in which SF 6 was measured as an internal reference have been taken into account . As suggested by Cookson, developing standard test electrodes for measuring the intrinsic insulating strength of gases is highly desired because quite a few well‐known dielectrics involve contradictive or scattered experimental E r . For example, the dielectric strength of SO 2 was reported to be either 1.0 or 0.52 .…”

Section: Methodsmentioning

confidence: 99%

Prediction on dielectric strength and boiling point of gaseous molecules for replacement of SF₆

Hou

Wang

2017

J Comput Chem

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Developing the environment-friendly insulation gases to replace sulfur hexafluoride (SF ) has attracted considerable experimental and theoretical attentions but without success. A computational methodology was presented herein for prediction on dielectric strength and boiling point of arbitrary gaseous molecules in the purpose of molecular design and screening. New structure-activity relationship (SAR) models have been established by combining the density-dependent properties of the electrostatic potential surface, including surface area and the statistical variance of the surface potentials, with the molecular properties including polarizability, electronegativity, and hardness. All the descriptors in the SAR models were calculated using density functional theory. The substitution effect of SF by various functional groups was studied systematically. It was found that CF is the most effective functional group to improve the dielectric strength due to the large surface area and polarizability. However, all the substitutes exhibit higher boiling points than SF because the molecular hardness decreases. The balance between E and T could be achieved by minimizing the local polarity of the molecules. SF CN and SF CFO were found to be the potent candidates to replace SF in view of their large dielectric strengths and low boiling points. © 2017 Wiley Periodicals, Inc.

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Section: Methodsmentioning

confidence: 99%

Prediction on dielectric strength and boiling point of gaseous molecules for replacement of SF₆

Hou

Wang

2017

J Comput Chem

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“…These disadvantages of CFzClz can be partly overcome by adding to it a certain gas or gas mixture. For instance, Cookson and Mastroianni (1980) reported that in SF,/COz/fluorocarbon mixtures SF,/C02 retarded carbon being formed from decomposition of the fluorocarbons due to breakdowns. Our own experience has also shown that mixing CFzC12 with CO2 may hinder its carbonisation.…”

mentioning

confidence: 99%

Measurement of ionisation and attachment coefficients in gas mixtures of difluorodichloromethane and carbon dioxide

Qiu¹,

Ren²,

Liu³

et al. 1989

J. Phys. D: Appl. Phys.

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“…There is, therefore, a need for developing standard measuring electrode systems such as ASTM Seavey Cell [21] and test procedures to get more accurate data which will be helpful in improving empirical expressions such as those developed in this paper for the sparking potentials of new insulating gases and their mixtures. …”

Section: Introductionmentioning

confidence: 99%

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

Nema

Kulkarni

Husain

1982

IEEE Trans. Elect. Insul.

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A simple formula is developed to predict the sparking potentials of SF6 and SF6-gas mixture in uniform and non-uniform fields.The formula has been shown to be valid over a very wide range from 1 to 1800 kPa-cm of pressure and electrode gap [1-7, 9-13, 17-19] and it would be useful to put this data in a handy form so that it can be used conveniently in practical problems of engineering interest.There is a definite indication from the published data [5][6][7] that the sparking potential of a mixture is related to the sparking potential of pure SF6, but so far no correlation effort has been made. In

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Electrical Breakdown Studies of Sf6/Co2/Fluorocarbon Mixtures

Cited by 13 publications

References 1 publication

Prediction on dielectric strength and boiling point of gaseous molecules for replacement of SF₆

Prediction on dielectric strength and boiling point of gaseous molecules for replacement of SF₆

Measurement of ionisation and attachment coefficients in gas mixtures of difluorodichloromethane and carbon dioxide

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

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Electrical Breakdown Studies of Sf6/Co2/Fluorocarbon Mixtures

Cited by 13 publications

References 1 publication

Prediction on dielectric strength and boiling point of gaseous molecules for replacement of SF6

Prediction on dielectric strength and boiling point of gaseous molecules for replacement of SF6

Measurement of ionisation and attachment coefficients in gas mixtures of difluorodichloromethane and carbon dioxide

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

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Product

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Prediction on dielectric strength and boiling point of gaseous molecules for replacement of SF₆

Prediction on dielectric strength and boiling point of gaseous molecules for replacement of SF₆