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Effect of artificial aging on polymeric surge arresters and polymer insulators for electricity distribution networks

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Effect of artificial aging on polymeric surge arresters and polymer insulators for electricity distribution networks

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Título Effect of artificial aging on polymeric surge arresters and polymer insulators for electricity distribution networks
Autor Ferreira, Carlos Arthur
Coser, Eliane
Angelini, Joceli Maria Giacomini
Rossi, José Antonio Donizete
Martinez, Manuel Luis Barreira
Abstract A study was conducted to evaluate new and laboratory-aged samples of surge arresters and anchorage polymeric insulators, for 12 and 24 kV networks, which are used by the Rio Grande Energia (RGE). Power Utility Polymeric compounds were analyzed by Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TG), Dynamic-Mechanic Analysis (DMA), Fourier Transformed Infrared Spectroscopy (FTIR) and Scanning Electronic Microscopy (SEM) to verify changes in the insulator properties due to degradation occurred during the experiments. The analyses were carried out before and after 6 months of aging in laboratory devices (weatherometer, 120 °C, salt spray, immersion in water). After the aging experiments, high-voltage electrical tests were also conducted: a radio interference voltage test and, simultaneously, the total and the internal leakage currents were measured to verify the surface degradation of the polymeric material used in the housing. The impulse current test was applied with current values close to 5, 10 and 30 kA, in order to force an internal degradation. Results showed that only surface degradation is detected at the polymer. The main properties of the parts were not affected by the aging. It confirms that polymer insulator and surge arrestor are appropriate for use in electricity distribution networks.
Contido em Polímeros (São Carlos): ciência e tecnologia. São Carlos, SP. Vol. 21, no. 5 (Dec. 2011), p. 436-442
Assunto Borracha de silicone
Isoladores poliméricos
Linhas de transmissão
Materiais poliméricos
[en] Leakage current
[en] Polymeric arrester
[en] Silicone degradation
[en] Silicone rubber insulators
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/75706
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