Solid residue formation of RTV silicone rubber due to dry-band arcing and thermal decomposition

Kumagai, Seiji; Wang, X.; Yoshimura, Noboru

doi:10.1109/94.671962

Cited by 62 publications

(23 citation statements)

References 30 publications

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“…The peaks corresponding to wave numbers 3700-3200 cm -1 and 1640 cm -1 are related to hydroxyl groups [6]. The FTIR results of the aged samples are shown in Table 2.…”

Section: Ftirmentioning

confidence: 98%

Characterization of field-aged 400 kV silicone rubber composite insulators

Xiong

Rowland

Robertson

et al. 2006

2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena

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A number of silicone rubber composite insulators have been removed after 15 years of service on a coastal 400 kV transmission line in the UK. Extensive analysis of their surface degradation is provided along with a description of their appearance. Material analysis shows cracking and oxidation of the surface. Ageing effects were far from uniform over each shed, the greatest oxidation being on the top surfaces of the sheds on the south side. Microscopy, EDX and FTIR were found to be the most useful and effective tools for analysis of these polymeric insulators.

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“…The peaks corresponding to wave numbers 3700-3200 cm -1 and 1640 cm -1 are related to hydroxyl groups [6]. The FTIR results of the aged samples are shown in Table 2.…”

Section: Ftirmentioning

confidence: 98%

Characterization of field-aged 400 kV silicone rubber composite insulators

Xiong

Rowland

Robertson

et al. 2006

2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena

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“…The residue was identified as conductive deposits as a result of contaminant evaporation; whereas, residue of SiR has been reported to be dominantly nonconductive in nature [20]. Therefore the residue reported in [19] may be considered as apparatus-related rather than from the sample itself.…”

Section: Introductionmentioning

confidence: 95%

“…It is also important to assess how fillers suppress the EDBA so that materials can be suitably specified for DC. Alumina trihydrate (ATH) and silica fillers have been compared [19], [20], with minor differences in the erosion reported of SiR under AC [22]. Such a comparison is also necessary under DC.…”

Section: Introductionmentioning

confidence: 97%

Investigation into the eroding dry-band arcing of filled silicone rubber under DC using wavelet-based multiresolution analysis

Ghunem

Jayaram

Cherney

2014

IEEE Trans. Dielect. Electr. Insul.

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This paper describes an investigation into the dry-band arcing mechanism leading to erosion of filled silicone rubber in the DC inclined plane test. Good correlation is obtained between the formation of surface residue, hotspots and the eroding dry-band arcing. The hotspots detected by infrared camera correlates well with the temperature of degradation determined by thermogravimetric analysis and differential scanning calorimetry. To characterize the physical mechanism of dry-band arcing, wavelet-based multiresolution analysis up to seven levels of resolution is applied to the leakage current waveforms. The analysis shows that both stable and intense discharges characterize the eroding dry-band arcing. A time-to-eroding parameter is proposed to determine the relative resistance to the formation of residue. Faster accumulation of residue is evident under -DC than +DC. Earlier inception of erosion is obtained for the silica filled-as compared to the alumina tri-hydrate filled-silicone, in which the release of the water of hydration is postulated to suppress the residue formation.Index Terms -Inclined plane test, silicone rubber, residue, dry band arcing, hotspot, erosion, wavelet transform, multiresolution analysis, alumina trihydrate filler, silica filler, HVDC insulation.

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“…Carbonized areas with higher electrical conductivity than uncarbonized areas concentrate the electrical field and hence create more dry band arcs. 18,19 SiOH groups (from Eq. (5)) and H 2 O also produce ionic conduction paths which caused tracking.…”

Section: Tracking Resistance Evaluationmentioning

confidence: 99%

Modified silicone rubber for use as high voltage outdoor insulators

et al. 2005

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ABSTRACT:Polymer insulation for outdoor use has become increasingly more important and is expected to dominate the future HV-outdoor applications. Polymeric insulators were reported to have performed better than porcelain and glass in laboratories and outdoor test sites. This paper reports an experimental investigation concerned with electrical and surface properties of a silicone-modified polymer in comparison with silicone rubber (SIR), ethylene-propylene-diene monomer (EPDM), and alloys of SIR-EPDM. The loss of hydrophobicity of polymeric materials induced by UV, salt spray, and water salinity aging was examined in this work. An ATR-FTIR technique was used to study the surface degradation of polymers occurring during UV aging. Tracking and erosion induced by high-electrical stresses reduce the lifetime of polymeric materials used for outdoor insulation. The results of standard tests showed that silicone rubber suffers from a deterioration of tracking resistance, caused

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Solid residue formation of RTV silicone rubber due to dry-band arcing and thermal decomposition

Cited by 62 publications

References 30 publications

Characterization of field-aged 400 kV silicone rubber composite insulators

Characterization of field-aged 400 kV silicone rubber composite insulators

Investigation into the eroding dry-band arcing of filled silicone rubber under DC using wavelet-based multiresolution analysis

Modified silicone rubber for use as high voltage outdoor insulators

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