Studies on High Temperature Vulcanized Silicone Rubber Insulators under Arid Climatic Aging

Chakraborty, Rahul and Reddy, Subba B (2017) Studies on High Temperature Vulcanized Silicone Rubber Insulators under Arid Climatic Aging. In: IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 24 (3). pp. 1751-1760.

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Abstract

In recent times, high temperature vulcanized (HTV) silicone rubber (SIR) insulators featuring several advantages, have gained importance over conventional ceramic and glass insulators. However, environmental stresses and electrical discharge activities degrade their superior performance therefore long term reliability of polymeric insulators is still under investigation. In the present work, arid climate aging experiments are carried out on SIR and effects of dry thermal exposure on composite insulators are investigated. Hydrophobicity recovery phenomenon for contaminated polymeric insulator sheds is reported with elevated temperature and a method proposed for achieving uniformity in pollution layer is also highlighted. Furthermore, Fourier transform infrared (FTIR) spectroscopy, X-Ray Photoelectron Spectroscopy (XPS), Scanning Electron Microscopy (SEM), Thermo-Gravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC) techniques are utilized to assess and analyze the changes in the material properties. The consequence of arid heating on tensile strength of SIR is evaluated. Also the dry flashover studies are carried out to discern the concerns related to the effects on thermally aged SIR insulators due to sudden over-voltages occurring in transmission lines.

Item Type:	Journal Article
Publication:	IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
Additional Information:	Copy right for this article belongs to the IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	12 Aug 2017 06:49
Last Modified:	12 Aug 2017 06:49
URI:	http://eprints.iisc.ac.in/id/eprint/57622

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