NDLI: Surface flashover characteristics of solid CL-polystyrene and related materials

Content Provider	IEEE Xplore Digital Library
Author	Elizondo, J.M. Dragt, A.J. Krogh, M. Stygar, B. Struve, K. Spielman, R. Prestwich, K.R.
Copyright Year	2001
Description	Author affiliation: Honeywell FM&T/NM, Albuquerque, NM, USA (Elizondo, J.M.; Dragt, A.J.; Krogh, M.)
Abstract	Insulator vacuum surface flashover continues to be a limiting factor in high voltage, high-energy vacuum-to-oil interfaces. CL-Polystyrene is being used in several applications due to its better flashover voltage hold-off. Insulator stacks, built following Martin's criteria, require that the material constant be known as well as the proper time scaling. We have performed a series of vacuum flashover experiments with a sufficient number of CL-Polystyrene samples to determine the material constant required for the JCM 45/spl deg/ empirical equation. It appears that most low voltage flashover events (due to possible conditioning) occur late in time (t/sub eff/ @ 63% or later), and most non-recoverable flashover events occur during the rise time (t/sub eff/ @ 89% or earlier). Testing was performed with a Marx Generator producing up to 400 kV peak voltage with a rise-time of 80 to 90 ns and a typical RC decay of 3 /spl mu/sec. Unrecoverable sample flashover was determined by three flashover events in a row. Scaling the JCM constant with t/sub eff/ @ 89%, and considering only the last three flashover events per sample, an average value of 235 is obtained for Polystyrene. When all the flashover events are considered in the scaling, an average constant value of 210 is then obtained. We have also performed testing on a similar number of samples of Perspex and Acrylic. Experimentally determined Weibull distributions are presented for the three materials.
Sponsorship	Plasma Sci. & Appl. Committee Pulsed Power Sci. & Technol. Committee of the IEEE Nucl. & Plasma Sci. Soc
Starting Page	1810
Ending Page	1813
File Size	203909
Page Count	4
File Format	PDF
ISBN	0780371208
DOI	10.1109/PPPS.2001.1001925
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-06-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Flashover Solids Testing Electrodes Laboratories Insulation Performance evaluation Equations Low voltage Weibull distribution
Content Type	Text
Resource Type	Article

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