Proceedings ArticleDOI
Understanding Hydrophobicity Recovery of Silicone Rubber Material Post Corona Ageing
Palash Mishra,Ramanujam Sarathi,Noboru Yoshimura +2 more
- pp 407-411
Reads0
Chats0
TLDR
Results indicate that surface potential and its decay time constant reduces drastically after the corona ageing, as compared to the virgin specimen, however, the test specimens regain their hydrophobicity, though at a different rate, with time.Abstract:
Surface hydrophobicity recovery of silicone rubber insulating material post corona ageing is reported in the present work. Recovery rate of hydrophobicity of uncleaned (S1) and cleaned sample (S2) after the corona ageing are compared. Results indicate that surface potential and its decay time constant reduces drastically after the corona ageing, as compared to the virgin specimen. However, the test specimens regain their hydrophobicity, though at a different rate, with time. Trap distribution characteristic shows that the characteristic time and charge trap depth reduces with the corona aged specimens and regain with rest period. A similar trend is observed with contact angle and corona inception voltage (CIV) of the test specimens. Pattern classification of Ultra High Frequency (UHF) discharge signal is done using modified Chaotic Analysis (CA).read more
Citations
More filters
Journal ArticleDOI
Investigation of Hydrothermally Stressed Silicone Rubber/Silica Micro and Nanocomposite for the Coating High Voltage Insulation Applications
Faiza,Abraiz Khattak,Safi Ullah Butt,Kashif Imran,Abasin Ulasyar,Asghar Ali,Zuhair S. Khan,Azhar Mahmood,Nasim Ullah,Ahmad Alahmadi,Adam Khan +10 more
TL;DR: In comparison to neat silicone rubber, the stability of the structure and hydrophobic behavior was better for micro-silica, which was further enhanced in the case of nanocomposites, which showed the best resistance against the applied stresses.
Proceedings ArticleDOI
Condition Monitoring of High Voltage Composite Insulators: Recent Trends and Findings
TL;DR: In this article, the state of the art with regard to the condition monitoring techniques/test methods being adopted for evaluating remaining four parameters viz. hydrophobicity, the resistance against corona discharge, flammability and UV weathering.
References
More filters
Journal ArticleDOI
Bringing an insulation to failure: the role of space charge
TL;DR: The goal is to show how much space charge can contribute directly or indirectly, through local electric field magnification or alteration, to increase ageing rate or even trigger more energetic, thus faster, degradation processes in insulation design and electrical apparatus long-term performance/reliability.
Journal ArticleDOI
Charge trapping and detrapping in polymeric materials
George Chen,Zhiqiang Xu +1 more
TL;DR: In this article, the characteristics of charge trapping and detrapping in low density polyethylene under dc electric field have been investigated using the pulsed electroacoustic technique, and a simple trap-and-detrapping model based on two trapping levels has been proposed.
Journal ArticleDOI
Aging of nonceramic insulators due to corona from water drops
TL;DR: In this article, the fundamental principles of water drop corona as an aging mechanism for nonceramic insulators are presented, and it is demonstrated that water drops in the shed and sheath regions enhance the electric field and may cause corona which can play an important role in long-term performance.
Journal ArticleDOI
The energy distribution of trapped charges in polymers based on isothermal surface potential decay model
TL;DR: In this article, a model based on isothermal surface potential decay (ISPD) is proposed to study the distribution of trapped charges by considering the physical mechanism of the detrapping process.
Related Papers (5)
Study on the Hydrophobicity of HTV SIR Treated by Different Corona Intensity
Ying Liang,C. R. Li,Lijian Ding +2 more