Leakage current patterns on contaminated polymeric surfaces

Fernando, M. A. R. M.; Gubanski, S.M.

doi:10.1109/94.798125

Cited by 75 publications

(38 citation statements)

References 12 publications

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“…No signs of dry band activity were noticed [8,9]. One should point here however the large difference between the levels of measured dc resistance (60-400 MQ) and the ac resistance (1.9 -4.75 GQ), the latter resulting from the ac leakage currents of 4-10 [A at 19 kV, despite of using the same clean fog conditions.…”

Section: E Ac Leakage Currentsmentioning

confidence: 83%

Performance of Silicone Rubber Composite Insulators in Sri Lanka

Fernando

Rajamantri²,

Gubanski³

2006

First International Conference on Industrial and Information Systems

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This paper presents the performance of silicone rubber composite insulators in Sri Lanka over ten years period. The study consisted of two phases. In the first phase (from 1995 -1999), different types of composite insulators were installed in 33 kV distribution network and were tested under marine, industrial (cement dust) and clean environments. Based on the outcomes of these tests a new set of silicone rubber insulators was selected for the phase two (2001)(2002)(2003)(2004)(2005)(2006) of the project under marine and clean environments. It was found that the silicone rubber insulators performed well during this period and there is a possibility for stressing such insulators higher than ordinary porcelain insulators. Further it was found that housing material composition influenced the performance of insulators stronger than the creepage distance.

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Section: E Ac Leakage Currentsmentioning

confidence: 83%

Performance of Silicone Rubber Composite Insulators in Sri Lanka

Fernando

Rajamantri²,

Gubanski³

2006

First International Conference on Industrial and Information Systems

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“…The principle of conductivity meter is given by -two electrodes are immersed in the sampie solution, a small potential is applied across the plates and the conductive current is measured. Flashover on Insulator Surface 134 Each one of these events is a necessary step in the development of a full f1ashover and can be reflected in the changes of the leakage current during the entire f1ashover process [6]. The leakage current must flow on the insulator surface when the contamination layer is moist [9,11].…”

Section: Test Proceduresmentioning

confidence: 99%

Evaluation and prediction of contamination level in coastal region insulators based on leakage current characteristics

Sidthik

Kalaivani

Iruthayarajan

2013

2013 International Conference on Circuits, Power and Computing Technologies (ICCPCT)

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The paper addresses the serious issue on insulators owing to partial discharge and flashover resulted from severe NaCl salt contaminant accumulation on transmission lines insulators located near the coastal areas. Disc type insulators such as porcelain and glass were tested at various NaCl salt pollution level in an artificial fog chamber according to IEC60S07 standard. The leakage currents associated with insulator types were recorded continuously at equal operating conditions (voltage, temperature and press ure). The statistical data of the leakage current such as the mean value (llll ean), maximum value (llll ax) and standard deviation (0') are considered. The recorded leakage currents are employed in Neural Network model as an input and using Feed Forward Back Propagation Network, the resultant contamination severity is predicted. This model is suitable to predict the Equivalent Salt Deposit Density (ESDD). The Neural Network Model is used to determine (predict) the intensity of leakage current (in mA) during security stage «SOmA) in the course of inception voltage.

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“…Power factor of resin epoxy resins is about 0.008 -0.04 [9]. There is several reports explained good insulation properties of epoxy resin used in polluted conditions [10][11][12][13]. According to Berahim [12] epoxy resin is a hydrophilic material therefore, in particular, in the tropical area; humidity and rainfall play an important role in accelerating of degradation process at the surface of the insulator.…”

Section: Introductionmentioning

confidence: 99%

“…According to Tumiran [8], by using degradation and chemical structure analysis of the RTV silane epoxy resins, it can be known that silane treatment of the filler can improve the electrical performance of RTV epoxy resins insulation material in some operating conditions. When the insulator is wet, a resistive surface LC flows, which is generally many orders of magnitude higher than the capacitive current in the case of dry insulators [5,13]. This LC results in non-uniform heating of the contamination layer that eventually causes dry bands to be formed at the narrow sections where the surface LC density is highest.…”

Section: Introductionmentioning

confidence: 99%