Influence of local field-concentration on surface flashover characteristics of spacers in SF6 gas

3 October 2016

conference paper
Published by Institute of Electrical and Electronics Engineers (IEEE)

p. 56-60
https://doi.org/10.1109/icei.1980.7470872

Abstract

Influences of local field-concentration on surface flashover characteristics of spacers in SF6-gas-insulated coaxial electrode systems were investigated. Flashover tests and field calculations were performed for disc-type and post-type spacers with local field-concentration near the outer electrode The results for disc-type spacers show that the influence of local field-concentration on flashover becomes remarkable at the high pressure range. Results of tests and calculations of post-type spacers confirmed that under certain conditions local field-concentrations caused by field singularity near the gas-epoxy-electrode interface reduced flashover voltages, but also that the flashover characteristics of such spacers were able to be improved by some slight changes of conditions near the interface.

Keywords

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