Breakdown Measurement of N2O Mixtures with CO2, N2, 02 in Uniform Electric Fields

Pachin, Juriy; Hösl, Andreas; Franck, Christian M.; Kumar, Siddharth; Huiskamp, T.; Pemen, A.J.M.

doi:10.1109/tdei.2021.009591

Cited by 1 publication

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References 11 publications

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“…The red curve in Figure 4 represents the streamer criterion computed using (α/N ) eff from [16], with a streamer constant, K of 25, which fits well with the measured data. The data are observed to be inline with our previous lab measurements [17], [18] with less than 5% difference. In Figure 5, the breakdown voltage increases almost perfectly linearly with pressure (R 2 value of 0.999) with a slope of 2.4 kV/(bar mm).…”

Section: Fig 2 Surface Profiling Of Polished Electrodes and Profile P...supporting

confidence: 90%

Improved Estimation of Uniform AC Electric Breakdown Field Strength of HFO1234ze(E)

Basu¹,

Pachin²,

Egüz³

et al. 2023

IEEE Trans. Dielect. Electr. Insul.

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The gas number-density reduced AC electric breakdown field strength (E/N) bd in pure HFO1234ze(E) is investigated from 0.45 bar to 4 bar with a variable electrode gap distance of 4.88, 10.00 and 13.32 mm. The aim of the present contribution is to clarify two aspects that are contradictorily reported in literature. Firstly, the pressure dependence of (E/N) bd and secondly the fact that the first breakdown value in HFO1234ze(E) can be significantly different from subsequent breakdowns in the same arrangement. To clarify these two aspects, particular attention is paid to improving the experimental procedure and to consider the role of electrode surface roughness and solid dissociation products caused by the breakdowns. The methodology of experimentation has been improved, compared to standard breakdown experiments: a freshly polished set of electrodes is used for every breakdown measurement and the electrode surface is preconditioned with low-energy breakdowns in CO 2 to reduce the possibility of micro-protrusions. A quantitative analysis confirms the improved and reproducible surface characteristics due to the preconditioning. The (E/N) bd values measured this way, show an increase with pressure up to 3 bar in 4.88 mm gap distance. In addition, it is confirmed that HFO1234ze(E) is a non-self-restoring gas. Subsequent breakdowns can be significantly lower than the first one across the measured pressure range and this decrease in breakdown strength increases, as energy input to the breakdown becomes higher.

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Section: Fig 2 Surface Profiling Of Polished Electrodes and Profile P...supporting

confidence: 90%

Improved Estimation of Uniform AC Electric Breakdown Field Strength of HFO1234ze(E)

Basu¹,

Pachin²,

Egüz³

et al. 2023

IEEE Trans. Dielect. Electr. Insul.

Self Cite

View full text Add to dashboard Cite

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Breakdown Measurement of N₂O Mixtures with CO₂, N₂, 0₂ in Uniform Electric Fields

Cited by 1 publication

References 11 publications

Improved Estimation of Uniform AC Electric Breakdown Field Strength of HFO1234ze(E)

Improved Estimation of Uniform AC Electric Breakdown Field Strength of HFO1234ze(E)

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