Publication detail

Study of switching behaviour of g3 based gas mixtures

GORTSCHAKOW, S. UHRLANDT, D. KLOC, P. AUBRECHT, V. COUFAL, O. RENAN, D. ROBIN-JOUAN, P.

Original Title

Study of switching behaviour of g3 based gas mixtures

Type

journal article in Web of Science

Language

English

Original Abstract

Ten years after its invention, g(3)- the mixture of C4F7N, CO2 and O-2- remains the most promising candidate for the substitution of SF6 as an insulating and switching gas. The extension and optimization of g(3) applications at a high-voltage level, especially in circuit breakers, requires knowledge of the properties and dynamics of arc discharges in this gas. The features of the arc plasma can be obtained from appropriate magneto-hydrodynamic simulations. To predict the arc behaviour, a consistent set of thermo-physical and radiation properties is necessary. The corresponding database is calculated for the case of local thermodynamic equilibrium and covers the temperature range 250-40 000 K, the pressure range 0.01-150 bar and various contents of C4F7N, O-2 and Teflon (nozzle material). This contribution presents examples of plasma composition, thermo-physical and radiation properties for g(3) mixtures. The feasibility of the new database is demonstrated on an example of simulation results for a g(3)-filled high-voltage circuit breaker. Predicted arc voltage and pressure build-up in selected volumes are compared with available experimental data. Furthermore, to explore the differences in switching behaviour between g(3) and SF6, simulations for these two gases at the same operation conditions were performed. The space- and time-dependent temperature and pressure profiles are presented and discussed.

Keywords

SF6 alternatives; C4F7N; thermal plasma properties; switching arc; transport properties; radiation properties

Authors

GORTSCHAKOW, S.; UHRLANDT, D.; KLOC, P.; AUBRECHT, V.; COUFAL, O.; RENAN, D.; ROBIN-JOUAN, P.

Released

6. 3. 2025

Publisher

IOP Publishing Ltd

Location

BRISTOL

ISBN

1361-6463

Periodical

Journal of Physics D - Applied Physics

Year of study

58

Number

15

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1

Pages to

17

Pages count

17

URL

https://iopscience.iop.org/article/10.1088/1361-6463/adb858

BibTex

@article{BUT198030,
  author="Sergey {Gortschakow} and Dirk {Uhrlandt} and Petr {Kloc} and Vladimír {Aubrecht} and Oldřich {Coufal} and De Holanda Sousa {Renan} and Philippe {Robin-Jouan}",
  title="Study of switching behaviour of g3 based gas mixtures",
  journal="Journal of Physics D - Applied Physics",
  year="2025",
  volume="58",
  number="15",
  pages="1--17",
  doi="10.1088/1361-6463/adb858",
  issn="1361-6463",
  url="https://iopscience.iop.org/article/10.1088/1361-6463/adb858"
}