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Understanding field failures of composite insulators

Nandi, S and Subba Reddy, B (2020) Understanding field failures of composite insulators. In: Engineering Failure Analysis, 116 .

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Official URL: https://doi.org/10.1016/j.engfailanal.2020.104758


The failure mechanism of in-service fiber reinforced plastic (FRP) rod used in composite insulators is studied experimentally; the integrity of Electrical/Chemical Resistance (ECR) of glass fibers in an epoxy-resin matrix of FRP rod used in transmission composite insulator is the subject of study. FRP Rods are subjected to extreme conditions of aging: the results of leakage current analysis, physical inspection, and corresponding Fourier Transform Infrared Spectroscopy (FTIR) strongly support the reason for the failure of FRP rods under operating condition. The entry of water inside the rod-silicone rubber interface, accompanied by arcing, rise in temperature cause considerable damage and hence failure in the operation of rods. Some interesting results of laboratory aging/failures are compared with field failure samples, also a laboratory method to evaluate failures of FRP rods is proposed. © 2020 Elsevier Ltd

Item Type: Journal Article
Publication: Engineering Failure Analysis
Publisher: Elsevier B.V.
Additional Information: Copyright for this article belongs to Elsevier B.V.
Keywords: Electric insulators; Epoxy resins; Fiber reinforced plastics; Fourier transform infrared spectroscopy; Insulating materials; Polymer matrix composites; Silicones, Composite insulators; Epoxy resin matrix; Extreme conditions; Fiber reinforced plastic(FRP); Laboratory methods; Leakage current analysis; Operating condition; Physical inspection, Failure (mechanical)
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 12 Nov 2021 09:19
Last Modified: 12 Nov 2021 09:19
URI: http://eprints.iisc.ac.in/id/eprint/66140

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