Degradation Dynamics of Polymeric Housing Materials Used for HV Line and Station Apparatus

Pinnangudi, B.; Gorur, R.S.; Poweleit, C. D.

doi:10.1109/tdei.2007.4339482

Cited by 11 publications

(8 citation statements)

References 17 publications

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“…Silicon rubbers (silicone) are widely used to prepare polymeric insulators for the application in outdoor HV insulators and varieties of other applications such as seals, o‐rings, tubes hose, and cables. Silicone owing to their superior service properties in the presence of heavy pollution and wet condition is used as a dielectric material for high‐temperature cables . Ethylene–propylene–diene terpolymer (EPDM), on the other hand, is one of the most widely used and fastest growing synthetic rubbers because of its excellent resistance to heat, oxidation, ozone, weathering, and microbial attack .…”

Section: Introductionmentioning

confidence: 99%

EPDM/silicone blend layered silicate nanocomposite by solution intercalation method: Morphology and properties

Acharya

Srivastava

2014

Polymer Composites

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Ethylene-propylene-diene terpolymer (EPDM)/silicone blend nanocomposites are prepared by solution method for the first time. EPDM and silicone rubber in their 50:50 (by weight) blend is intercalated within the silicate sheets of organically modified montmorillonite. Organic modification to the pristine sodium montmorillonite (Na-MMT) surfaces is carried out by ionexchange reaction using hexadecyl ammonium chloride. The incorporation of such organic functional group makes Na-MMT hydrophobic and expands the interlayer spacing between silicate sheets. The intercalated structure of EPDM/silicone blend nanocomposites is characterized by the X-ray diffraction. Transmission electron microscopic characterization visualized the presence of both exfoliated and intercalated layered silicate in the polymer nanocomposites. The mechanical properties of the nanocomposites show a maximum improvement in tensile strength and elongation at break of 23 and 68%, respectively, compared with EPDM/silicone blend. The dielectric measurement demonstrates the increase in relative permittivity for the nanocomposite than the pure blend.

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Section: Introductionmentioning

confidence: 99%

EPDM/silicone blend layered silicate nanocomposite by solution intercalation method: Morphology and properties

Acharya

Srivastava

2014

Polymer Composites

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“…Furthermore, he pointed out that UnHCEP owns emphasised hydrophobic properties that reduce significantly the leakage current magnitude. The rate of surface degradations on epoxy resins due to PDs is very limited due to their elevated activation energy [44]. Consequently, polymeric chains scission by pyrolysis need higher temperatures to induce some surface damages [45].…”

Section: Discussionmentioning

confidence: 99%

Assessment of the resistance to tracking of polymers in clean and salt fogs due to flashover arcs and partial discharges degrading conditions on one insulator model

Douar

Béroual

Souche³

2016

IET Generation, Transmission & Distribution

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International audienceThis paper describes the assessment of the resistance to tracking of various polymers after (i) flashover voltage (FOV) and flashover gradient (FOG); and (ii) partial discharges (PDs) measurements in dry, clean and salt fogs on one insulator model using standardised electrodes; the aim being the development of optimised methods based on flashover and PDs to the conception of new generation of piercing connectors. The investigated materials belong to two distinct classes widely used in the electrical industry: thermoplastics (namely polyphenylene sulfide and high density polyethylene) and thermosetting cycloaliphatic epoxy resins namely one unfilled material (UnCEP) and another unfilled and hydrophobic resin (UnHCEP). FOV measurements are based on the electro-geometrical parameters of each specimen and the resistance to tracking, both may be assessed through the slope of FOV curves against the leakage distance as an indicator of surface damages. Regarding PDs, the suggested technique is devoted to clean and salt fogs and provides quicker and more accurate information about PDs effects on materials deteriorations rather than IEC60109 where the exposition time to discharges is much longer at lower voltage levels by using only liquid contaminants such as sulfuric or nitric acids or ammonium chloride as described in IEC60587 or ASTM D2303

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“…Polymeric materials with low weight and standing electrical and mechanical properties are widely utilized in electric insulation applications [15,19,20]. However, most of such organic materials can be damaged by tracking due to the change in the carbon bonds in their inner structure, and thus, the polymer resistance towards electrical discharges is much lower compared to inorganic insulator materials such as glass or porcelain [21]. Research on tracking resistance of insulation materials is a key point to ensure the long-term reliability [15] and safety of electrical insulation systems [22].…”

Section: Factors Affecting Arc Trackingmentioning

confidence: 99%

Arc Tracking Control in Insulation Systems for Aeronautic Applications: Challenges, Opportunities, and Research Needs

Riba

Gómez-Pau

Moreno-Eguilaz

et al. 2020

Sensors

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Next generation aircrafts will use more electrical power to reduce weight, fuel consumption, system complexity and greenhouse gas emissions. However, new failure modes and challenges arise related to the required voltage increase and consequent rise of electrical stress on wiring insulation materials, thus increasing the risk of electrical arc appearance. This work performs a critical and comprehensive review concerning arc tracking effects in wiring insulation systems, underlying mechanisms, role of materials and possible mitigation strategies, with a special focus on aircraft applications. To this end an evaluation of the scientific and technological state of the art is carried out from the analysis of theses, research articles, technical reports, international standards and white papers. This review paper also reports the limitations of existing insulation materials, standard test methods and mitigation approaches, while identifying the research needs to comply with the future demands of the aircraft industry.

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Degradation Dynamics of Polymeric Housing Materials Used for HV Line and Station Apparatus

Cited by 11 publications

References 17 publications

EPDM/silicone blend layered silicate nanocomposite by solution intercalation method: Morphology and properties

EPDM/silicone blend layered silicate nanocomposite by solution intercalation method: Morphology and properties

Assessment of the resistance to tracking of polymers in clean and salt fogs due to flashover arcs and partial discharges degrading conditions on one insulator model

Arc Tracking Control in Insulation Systems for Aeronautic Applications: Challenges, Opportunities, and Research Needs

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