Comparison of surface tracking in polymeric insulating materials

Rajini, V.; Kanchana, K.; Gowrishree, V.; Udayakumar, K.

doi:10.1109/icpst.2004.1460242

Cited by 5 publications

(5 citation statements)

References 9 publications

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“…Electrical tracking refers to the electrical and thermal activity generated along conductive carbon paths in the surface of organic insulators due to surface PD activity, often triggered by the presence of moisture, liquids, dust, or debris, i.e., surface contamination [ 55 , 56 , 57 ]. Electrical tracking can also be initiated by mechanical means, such as insulation abrasion, chafing between different wires or between a wire and the structure of the vehicle, or even by short circuits [ 57 ].…”

Section: The Arc Tracking Phenomenonmentioning

confidence: 99%

Tracking Resistance in Polymeric Insulation Materials for High-Voltage Electrical Mobility Applications Evaluated by Existing Test Methods: Identified Research Needs

Riba,

Moreno-Eguilaz,

Bogarra

2023

Polymers

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With the increasing electrification of the transportation and mobility sectors, polymer insulation materials are inevitably exposed to harsher environments, including exposure to contamination, wide temperature ranges, operation at higher voltages and switching frequencies, and low-pressure environments. This paper reviews the tests to characterize the polymeric materials used in insulation systems for electric mobility applications, focusing on resistance to tracking. This paper also reports on the limitations of existing standard test methods and identifies the challenges and research needs to meet the increasing demands of the electric mobility industry. To this end, an evaluation of the scientific and technological state of the art is carried out through the analysis of theses, research articles, technical reports, manufacturers’ datasheets, international standards, and white papers.

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Section: The Arc Tracking Phenomenonmentioning

confidence: 99%

Tracking Resistance in Polymeric Insulation Materials for High-Voltage Electrical Mobility Applications Evaluated by Existing Test Methods: Identified Research Needs

Riba,

Moreno-Eguilaz,

Bogarra

2023

Polymers

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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].…”

Section: Factors Affecting Arc Trackingmentioning

confidence: 99%

“…Tracking typically arises due to surface contamination [39]. Arc tracking usually requires a polymeric insulating surface contaminated with humidity, liquids, conductive dusts or salts [19,32], placed in a circuit with a sufficient voltage applied, contamination generating a closed electrical circuit across the polymer surface, and time. Arc tracking corresponds to the propagation of the arc along the wires due to ablation of the metallic core and degradation of the insulation [4].…”

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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“…Leakage current exhibits pure sinusoidal waveform whereas discharge and tracking signals depicts oscillations and shoulders on the sinusoidal wave [2,5]. It is considerably an easy task to determine leakage currents on the insulator; however it is much more complicated to classify current signals either as discharge or as tracking.…”

Section: Introductionmentioning

confidence: 99%

“…The non-stationary currents may lead to continuous discharges and oscillations on the surface of an insulator, followed with hot spots and dry bands which finally end up as carbonized tracking paths (total breakdown) [5]. The lifetime of an insulator can be increased by cleaning up its contaminated surface which might limit surface discharges before a total breakdown occurs.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Degradative Signals on Outdoor Solid Insulators Using Continuous Wavelet Transform

Uzunoğlu¹

2016

Journal of Electrical Engineering and Technology

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-Most outdoor solid insulators may suffer from surface degradations due to non-stationary currents that flow on the insulator surface. These currents may be classified as leakage, discharge and tracking currents due to their disturbing potencies respectively. The magnitude of these currents depends on the degree of the contamination of surface. The leakage signals are followed by discharge signals and tracking signals which are capable of forming carbonized tracking paths on the surface between high voltage and earth contacts (surface tracking). Surface tracking is one of the most breakdown mechanisms observed on the solid insulators, especially polymers which may cause severely reduced lifetime. In this study the degradations observed on polyester resin based insulators are investigated according to the IEC 587 Inclined Plane Test Standard. The signals are monitored and recorded during tests until surface tracking initiated. In order to prevent total breakdown of an insulator, early detection of tracking signals is vital. Continuous Wavelet Transform (CWT) is proposed for classification of signals and their energy levels observed on the surface. The application of CWT for processing and classification of the surface signals which are prone to display high frequency oscillations can facilitate real time monitoring of the system for diagnosis.

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Comparison of surface tracking in polymeric insulating materials

Cited by 5 publications

References 9 publications

Tracking Resistance in Polymeric Insulation Materials for High-Voltage Electrical Mobility Applications Evaluated by Existing Test Methods: Identified Research Needs

Tracking Resistance in Polymeric Insulation Materials for High-Voltage Electrical Mobility Applications Evaluated by Existing Test Methods: Identified Research Needs

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

Investigation of Degradative Signals on Outdoor Solid Insulators Using Continuous Wavelet Transform

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