Electric stress grading of composite bushings using high dielectric constant silicone compositions

Shen, Yilin; Cherney, E.A.; Jayaram, S.

doi:10.1109/elinsl.2004.1380575

Cited by 7 publications

(1 citation statement)

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“…Future prospects require further evaluation of the fundamental characteristics of polymers as high voltage insulators to withstand high temperature and bad weathering. 7,[15][16][17] In this paper we present the variation of dielectric breakdown strength (V/mil) for EPDM rubber samples filled with different carbon black and other inorganic fillers. Different types of carbon black were investigated and three different inorganic fillers.…”

Section: Introductionmentioning

confidence: 99%

High temperature vulcanized ethylene propylene diene rubber nanocomposites as high voltage insulators: Dielectric breakdown measurements and evaluation

Abou-Kandil

Nasrat

Fareed

2022

Polymers and Polymer Composites

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The use of porcelain and thermoplastic based materials as High voltage insulators has always been dominant in the industry. Several elastomers were also investigated, mainly Ethylene Propylene Rubber and Silicone rubbers were used as replacement of the traditional Porcelain high Voltage insulators. In this study we experiment with new elastomer, Ethylene propylene diene rubber (EPDM), that is capable of withstanding high voltage as well as being resistant to severe weathering conditions. In addition to having excellent mechanical properties that we discussed elsewhere. Detailed dielectric breakdown measurements were carried out for room temperature vulcanized and high temperature vulcanized samples. The effects of exposure to UV radiation on the dielectric breakdown strength was also studied. Different fillers were used to improve the dielectric breakdown strength of different polymer matrices. Both carbon black based fillers and inorganic fillers were experimented in order to reach optimum mix properties that provide the best dielectric breakdown strength. Resistance to thermal aging and UV radiation was also carried out on EPDM samples.

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Section: Introductionmentioning

confidence: 99%

High temperature vulcanized ethylene propylene diene rubber nanocomposites as high voltage insulators: Dielectric breakdown measurements and evaluation

Abou-Kandil

Nasrat

Fareed

2022

Polymers and Polymer Composites

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Silicone rubber dielectrics modified by inorganic fillers for outdoor high voltage insulation applications

Cherney

CEIDP '05. 2005 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2005.

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The paper discusses the mechanisms by which inorganic fillers in silicone rubber dielectrics enhance the properties of thermal conductivity, relative permittivity, and electrical conductivity making them useful in outdoor high voltage insulation applications. The addition of alumina tri-hydrate or silica fillers to silicone elastomers, forming binary composites with enhanced thermal conductivity, is discussed in relation to filler type, particle size, shape, and concentration, and its use as a housing material for non-ceramic insulators to minimize material erosion at dry band arcing sites by lowering hot spot temperature. Also discussed is the enhanced relative permittivity of silicone dielectrics that is obtained through the addition of barium titanate powder which can be further increased with the addition of aluminium powder forming a tertiary composite, resulting in a significant grading of the surface electric field when applied as a housing material to high voltage bushings. Controlled electrical conductivity of silicone dielectrics is discussed through the use of antimonydoped tin oxide filler binary composites and when applied as a housing material to outdoor bushings, the pollution performance is greatly enhanced.

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Effect of Surfactant on Dielectric and Thermal Properties of Silicone Nanocomposites

Khanum

Sharma

Jayaram

2019

2019 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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Electric stress grading of composite bushings using high dielectric constant silicone compositions

Cited by 7 publications

References 4 publications

High temperature vulcanized ethylene propylene diene rubber nanocomposites as high voltage insulators: Dielectric breakdown measurements and evaluation

High temperature vulcanized ethylene propylene diene rubber nanocomposites as high voltage insulators: Dielectric breakdown measurements and evaluation

Silicone rubber dielectrics modified by inorganic fillers for outdoor high voltage insulation applications

Effect of Surfactant on Dielectric and Thermal Properties of Silicone Nanocomposites

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