Proceedings ArticleDOI
Influence of relative humidity on surface charge decay on epoxy resin insulators
B. Lutz,Josef Kindersberger +1 more
- pp 883-886
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TLDR
In this article, the influence of relative air humidity on the surface charge decay on epoxy resin insulators initially charged by DC corona and on their surface resistivity is investigated at room temperature.Abstract:
The influence of relative air humidity on the surface charge decay on epoxy resin insulators initially charged by DC corona and on their surface resistivity is investigated at room temperature. It has been observed, that surface resistivity of the epoxy resin insulators decreases significantly at higher relative humidity. Thus, at higher relative humidity surface charge decay is dominated by electric conduction along the insulator surface. This effect has been verified by both, measurement and simulation of the surface charge decay.read more
Citations
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Journal ArticleDOI
Surface charge migration and dc surface flashover of surface-modified epoxy-based insulators
TL;DR: In this paper, the effect of direct fluorination on surface charge migration and flashover voltage was verified, and it was shown that the surface charge decay of epoxy-based model insulators is a slow process, but the decay rate increases when an outer dc electric field is applied.
Journal ArticleDOI
Surface charge decay on polymeric materials under different neutralization modes in air
TL;DR: In this article, surface charge decay on HTV silicone rubbers charged by impulse corona is studied, where surfaces of the materials exposed to corona were kept open to ambient air whereas the opposite surfaces were in contact with a grounded copper plate and surface potential distributions on the samples were measured using Kelvin type electrostatic probe.
Journal ArticleDOI
Aging characterization of high temperature vulcanized silicone rubber housing material used for outdoor insulation
Wei Song,Wen-Wei Shen,Guan-Jun Zhang,Bai-Peng Song,Yan Lang,Guo-Qiang Su,Hai-Bao Mu,Junbo Deng +7 more
TL;DR: In this paper, the authors compared the performance of artificially corona-aged and naturally site-aged SIR materials and their properties such as hydrophobicity, leakage current, trap density/energy level, surface microstructure and chemical composition.
Journal ArticleDOI
AC and DC zone-induced ageing of HTV silicone rubber
TL;DR: In this paper, the authors compared the influences of ac and dc corona-ozone exposures on high temperature vulcanized (HTV) silicone rubbers and found that the sensitivity of surface resistivity to the treatments was strong.
Journal ArticleDOI
Surface charge inversion algorithm based on bilateral surface potential measurements of cone-type spacer
TL;DR: In this article, an improved surface charge inversion algorithm considering the surface potential of both sides of a cone-type model spacer was developed, and the improved method was verified experimentally using a cone type spacer.
References
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Journal ArticleDOI
Surface charge decay on insulators in air and sulfurhexafluorid - part I: simulation
Josef Kindersberger,Ch. Lederle +1 more
TL;DR: In this article, the decay of surface charges on polymeric insulators in air and SF6 is studied, and three mechanisms, by volume and surface resistivity of the insulator as well as by neutralization from the gas, are investigated.
Journal ArticleDOI
Water vapour adsorption and surface conductivity in solids
Y Awakuni,J H Calderwood +1 more
TL;DR: In this article, the water adsorption and voltage dependence of the surface conduction current at room temperature at various relative humidities for quartz, Teflon and cellulose acetate were investigated using the BET equation.
Journal ArticleDOI
Electrical properties of surfaces of polymeric insulators
TL;DR: In this article, a review of published data, their analysis, and models related to water adsorption and surface conductivity in a humid environment of unirradiated and gamma-IRradiated practical insulating solid polymers is presented.
Journal ArticleDOI
Surface-potential decay due to surface conduction
TL;DR: In this article, the time dependence of the surface potential of an insulating material is theoretically investigated in the case of simultaneous surface and volume ohmic conduction, and it is shown that the first part of the decrease with time of surface potential is strongly influenced by the initial distribution of charges and cannot be used to determine the surface conductivity.
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