Impact of Volume Breakdown on Surface Flashover in High Pressure SF_{6}

• Authors: A. Neuber , J. Krile , G. Rogers , H. Krompholz
• Languages of publication: EN

Abstracts

EN

We investigate the pulsed flashover voltage of dielectric samples at up to 4 bar SF_{6} in the simultaneous presence of a high current (>10 kA, ∼20 microsecond pulse) volume discharge nearby. The chosen distance, ∼7 cm, between surface and volume breakdown is consistent with conditions found in the Sandia-Z-machine type rimfire switch. For a flashover gap distance of 24 mm and a simultaneous excitation within ∼ 5 microseconds, we observe an average reduction in the flashover voltage from 164 kV to 142 kV at 3.7 bar when the volume discharge is turned on. The test setup utilizing a magnetic switching scheme operating at 320 kV and 10 kA is briefly discussed along with the breakdown properties and the spectral characterization of the volume/surface flashover discharge plasma. In general, UV light propagates relatively unattenuated for wavelengths >160 nm in the high pressure SF_{6} from the volume discharge to the dielectric surface, setting up conditions which are conducive to photoelectron emission from the dielectric.

Keywords

EN

51.50.+v; 52.80.Mg; 52.70.Kz

Discipline

• 52.70.Kz: Optical (ultraviolet, visible, infrared) measurements
• 51.50.+v: Electrical properties (ionization, breakdown, electron and ion mobility, etc.)(see also 52.80.-s Electric discharges in physics of plasmas)
• 52.80.Mg: Arcs; sparks; lightning; atmospheric electricity(see also 92.60.Pw Atmospheric electricity, lightning in meteorology)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 115
• Issue: 6
• Pages: 995-997

Dates

published

2009-06

Contributors

author

A. Neuber

• Texas Tech University, Center for Pulsed Power & Power Electronics, Lubbock, TX, USA

author

J. Krile

• Texas Tech University, Center for Pulsed Power & Power Electronics, Lubbock, TX, USA

author

G. Rogers

• Texas Tech University, Center for Pulsed Power & Power Electronics, Lubbock, TX, USA

author

H. Krompholz

• Texas Tech University, Center for Pulsed Power & Power Electronics, Lubbock, TX, USA

References

• 1. D.R. Humphreys, K.J. Penn, J.S. Cap, R.G. Adams, J.F. Seamen, B.N. Turman, 5th IEEE Pulsed Power Conf., Washington 1985, p. 262
• 2. R. Vela, J.T. Krile, A.A. Neuber, H.G. Krompholz, IEEE Pulsed Power and Plasma Science Conf. 2007, p. 1831
• 3. K. Morales, J. Krile, A. Neuber, H. Krompholz, IEEE Trans. Dielectr. Electr. Insul. 13, 803 (2006)

Identifiers

DOI

10.12693/APhysPolA.115.995