Mass-spectroscopic study of the influence of nozzle material on high-pressure SF6 arcs

Meier, R.; Kneubühl, Fritz Kurt; Schötzau, H. J.

doi:10.1007/bf00694346

Cited by 4 publications

(1 citation statement)

References 20 publications

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“…The effective ablation enthalpy shows a stronger dependence on the specific gas properties. In order to validate the model, the vapour temperatures and the effective ablation enthalpies for other polymer materials exposed to electric arcs should be measured [12]. Unfortunately, the value of h eff requires the knowledge of Q rad entering the Knudsen layer, but in most cases only the total arc power is known of which Q rad is only a small fraction.…”

Section: Discussionmentioning

confidence: 99%

A maximum entropy production model for Teflon ablation by arc radiation

Christen¹

2007

J. Phys. D: Appl. Phys.

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In the framework of the maximum entropy production rate principle, a simple model for Teflon material ablation by arc radiation is introduced. The model predicts a vapour temperature T and an effective ablation enthalpy Δheff of about 3200 K and 11 MJ kg−1, respectively. These values are constant for radiation fluxes Qrad ≪ pΔheff/c (≈1010 W m−2 at pressure p ≈ 10 bar and sound velocity c≈ 103 m s−1). For larger Qrad the model is not self-consistent and must be generalized. In the range of self-consistency, the results are in accordance with observations reported in the relevant literature on nozzle ablation in gas circuit breakers or model tubes.

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Section: Discussionmentioning

confidence: 99%

A maximum entropy production model for Teflon ablation by arc radiation

Christen¹

2007

J. Phys. D: Appl. Phys.

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Characterization of degradation fragments released by arc-induced ablation of polymers in air

Aminlashgari

Becerra

Hakkarainen

2016

J. Phys. D: Appl. Phys.

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Light reflectance and arc resistance of nozzle for circuit breaker

Park

Kang

Ahn

et al.

Proceedings of the 2004 IEEE International Conference on Solid Dielectrics, 2004. ICSD 2004.

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A study on the arc resistance and light reflectance of PTFE nozzle for circuit breaker is presented. PTFE has been used widely as a material for circuit breaker nozzle. In the arcing environment in a circuit breaker, the fraction of the radiation power is emitted out of the arc and reaches the nozzle wall by radiation, causing ablation at the surface and in the depth of the wall. In this paper, some tillers that have endurance in the high temperature arc environment were added into PTFE. Adding some tillers into PTFE was expected to be efficient in improving the endurability against radiation. The light reflectance and arc resistance of PTFE composites were investigated.

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Mass-spectroscopic study of the influence of nozzle material on high-pressure SF6 arcs

Cited by 4 publications

References 20 publications

A maximum entropy production model for Teflon ablation by arc radiation

A maximum entropy production model for Teflon ablation by arc radiation

Characterization of degradation fragments released by arc-induced ablation of polymers in air

Light reflectance and arc resistance of nozzle for circuit breaker

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