Life estimation and investigation of dielectric strength of multistressed high‐voltage epoxy micro and nanocomposites

Amin, Muhammad; Khattak, Abraiz; Ali, Mohammad

doi:10.1049/mnl.2016.0343

Cited by 13 publications

(3 citation statements)

References 20 publications

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“…Polymeric insulators offered numerous compensations as compared to the traditional insulation [ 1 , 2 , 3 , 4 ]. The advantages of polymeric insulation include higher resistance to flashovers, resistance to contaminations, better dielectric properties, higher tensile strength, ease of installation, less maintenance and lower cost [ 4 , 5 , 6 ]. Due to their superior properties, polymers find their usage as high voltage insulation and dielectric applications [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Ramped Compression Effect on the Dielectric Properties of Silicone Rubber Composites for the Coating of High-Voltage Insulation

et al. 2022

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The incorporation of inorganic oxide fillers imparts superior dielectric properties in silicone rubber for high-voltage insulation. However, the dielectric characteristics are influenced by the mechanical stress. The effects of ramped compression on the dielectric properties of neat silicone rubber (NSiR), 15% SiO2 microcomposite (SSMC), 15% alumina trihydrate (ATH) microcomposite (SAMC) and 10% ATH + 2% SiO2 hybrid composite (SMNC) are presented in this study. The dielectric constant and dissipation factor were measured before and after each compression especially in the frequency range of 50 kHz to 2MHz. Before the compression, SSMC expressed the highest dielectric constant of 4.44 followed by SMNC and SAMC. After the compression cycle, SAMC expressed a better dielectric behavior exhibiting dielectric constant of 7.19 and a dissipation factor of 0.01164. Overall, SAMC expressed better dielectric response before and after compression cycle with dielectric constant and dissipation factor in admissible ranges.

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Section: Introductionmentioning

confidence: 99%

Investigation of Ramped Compression Effect on the Dielectric Properties of Silicone Rubber Composites for the Coating of High-Voltage Insulation

et al. 2022

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“…If electrical applications of both types are compared, epoxy material gives much better properties during usage, which makes it a first choice for modern electrical power systems [ 2 , 3 , 4 , 5 ]. Epoxy insulators have better resistance to mechanical stress, flashovers, anti-tracking, and erosion [ 6 , 7 , 8 , 9 ]. Epoxy resins also possess tremendous properties which can be used as insulators (for example, better hydrophobicity, better mechanical strength, high dielectric strength, and easy processing for usage in power systems) [ 10 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Degradation Performance Investigation of Hydrothermally Stressed Epoxy Micro and Nanocomposites for High Voltage Insulation

et al. 2022

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Epoxy resins have demonstrated remarkable properties with potential for usage as high voltage insulators. However, a loss of these properties has been observed in high temperature and humid environments. In order to enhance the hydrothermal stability of epoxy resins, micro (15% SiO2) and nano (5% SiO2) silica-based composites of epoxy were fabricated and subjected to standard long term and short term accelerated hydrothermal conditions. To analyze the effect of these stresses, the samples were analyzed periodically through Fourier transform infrared spectroscopy (FTIR) for structure analysis; scanning electron microscopy (SEM) for surface analysis of long-term aged samples; and optical microscopy for the surface topography of short-term aged samples. The Swedish Transmission Research Institute (STRI) classification and contact angle measurement techniques were used for hydrophobicity analysis of long-term and short-term aged samples, respectively. After aging in both conditions, the nanocomposite showed better results as compared to the other samples. After 1000 h of aging, it showed HC-5 class of hydrophobicity, whereas EMC and NE degraded to the HC-6. In case of short-term aging, the contact angle decreased to the 64.15° and 75.05° from 104.15° and 114.9° for ENC and EMC, respectively. Also, in terms of structural degradation, ENC showed the highest structural stability after 1000 h of aging with the highest stable peak of aromatic ether at 1300–1500 cm−1. Microscopic observation through scanning electron and optical techniques also revealed superior performance of the nanocomposites.

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“…Among different classes of fillers, inorganic oxides have been proved favorable for acquiring mandatory enlargement in nano/micro polymer dielectrics [ 29 , 30 ]. The literature shows that by the addition of inorganic fillers, an increased dielectric constant with low heat dissipation can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Multi-Stressed Nano and Micro-Silica/Silicone Rubber Composites with Improved Dielectric and High-Voltage Insulation Properties

et al. 2021

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The scope of silicone rubber (SiR) is confined due to the deprivation of its dielectric propertiesupon exposure to various ambient stresses. The aim of this research is to develop silicone rubber-based composites by employing inorganic oxide fillers for improved dielectric and high voltage insulation properties for widening its scope in the field of electrical appliances. This study reports the preparation of different composites of silicone rubber with varying concentrations of micro and nano-silica fillers. The dielectric propertytrends of these as-prepared neat and impregnated samples were examined via an indigenously developed weathering chamber capable of applying multiple stresses of acid rain, heat, humidity, UVA radiation, and salt fog. Dielectric constant values were measured before and after applying stresses. Upon applying stresses, a periodic decline in dielectric constant was observed. Improved dielectric properties were obtained by adding micro and nano-silica as fillers. A nano silica-incorporated silicone rubber product exhibited good potential for dual applications as dielectric and high voltage insulation.

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Life estimation and investigation of dielectric strength of multistressed high‐voltage epoxy micro and nanocomposites

Cited by 13 publications

References 20 publications

Investigation of Ramped Compression Effect on the Dielectric Properties of Silicone Rubber Composites for the Coating of High-Voltage Insulation

Investigation of Ramped Compression Effect on the Dielectric Properties of Silicone Rubber Composites for the Coating of High-Voltage Insulation

Degradation Performance Investigation of Hydrothermally Stressed Epoxy Micro and Nanocomposites for High Voltage Insulation

Multi-Stressed Nano and Micro-Silica/Silicone Rubber Composites with Improved Dielectric and High-Voltage Insulation Properties

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