Comparative characterisation of conventional and textured 11 kV insulators using the rotating wheel dip test

Surface tracking and erosion is an irreversible degradation occurring on the insulator surface, and this can ultimately lead to failure of the insulator. Polymeric materials such as silicone rubber have many advantages; including a superior hydrophobic surface. However, polymers are exposed to agein...

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Bibliographic Details
Published in:High voltage 2020-12, Vol.5 (6), p.739-746
Main Authors: Krzma, Adnan, Albano, Maurizio, Haddad, Abderrahmane
Format: Article
Language:English
Subjects:
ageing
comparative characterisation
electric admittance measurement
electrical stress
environmental factors
environmental stress
erosion
failure analysis
feature identification
future surface degradation prediction
hydrophobic surface
hydrophobicity
infrared imaging
insulator failure
insulator profiles
insulator surface
insulator testing
insulator trunk
IR camera
irreversible degradation
localised surface conductance measurements
polymer insulators
polymeric materials
Research Article
rotating wheel dip test
shed surface monitoring
silicon rubber
silicone rubber
silicone rubber insulators
surface conduction
surface tracking
temperature distribution
textured insulators
voltage 11.0 kv
voltage 11.0 kV
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Summary:Surface tracking and erosion is an irreversible degradation occurring on the insulator surface, and this can ultimately lead to failure of the insulator. Polymeric materials such as silicone rubber have many advantages; including a superior hydrophobic surface. However, polymers are exposed to ageing and degradation resulting from electrical and environmental stresses. The rotating wheel dip test is adopted to conduct a comparative study of surface conduction on the two insulators. A conventional design has been selected and compared with insulators having textured surface. Monitoring of the shed surface and insulator trunk using an IR camera were carried out to assess the temperature distribution along insulator profiles. A spatial analysis was also performed to identify key features of the two designs. Localised surface conductance measurements are proposed in this study. This helps to understand and distinguish the trends of conductance and its distribution on each surface, helping to predict the future surface degradation associated to each design.
ISSN:2397-7264
2397-7264
DOI:10.1049/hve.2019.0189