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Effects of RTV coating on the electrical performance of polymer insulator under lightning impulse voltage condition


Jamaludin, Farah Adilah and Ab Kadir, Mohd Zainal Abidin and Izadi, Mahdi and Azis, Norhafiz and Jasni, Jasronita and Abd Rahman, Muhammad Syahmi (2017) Effects of RTV coating on the electrical performance of polymer insulator under lightning impulse voltage condition. PLOS ONE, 12 (11). art. no. e0187892. pp. 1-14. ISSN 1932-6203


Located near the equator, Malaysia is a country with one of the highest lightning densities in the world. Lightning contributes to 70% of the power outages in Malaysia and affects power equipment, automated network systems, causes data losses and monetary losses in the nation. Therefore, consideration of insulator evaluation under lightning impulses can be crucial to evaluate and attempt to overcome this issue. This paper presents a new approach to increase the electrical performance of polymer insulators using a Room Temperature Vulcanisation (RTV) coating. The evaluation involves three different settings of polymer insulator, namely uncoated, RTV type 1, and RTV type 2 upper surface coatings. All the insulators were tested under three different conditions as dry, clean wet and salty under different impulse polarities using the even-rising test method. The voltage breakdown for each test was recorded. From the experiment, it was found that the effectiveness of the RTV coating application became apparent when tested under salty or polluted conditions. It increased the voltage withstand capabilities of the polymer insulator up to 50% from the basic uncoated insulator. Under dry and clean conditions, the RTV coating provided just a slight increase of the breakdown voltage. The increase in voltage breakdown capability decreased the probability of surface discharge and dry band arcing that could cause degradation of the polymeric material housing. The RTV type 1 coating was found to be more effective when performing under a lightning impulse. The findings might help the utility companies improve the performance of their insulators in order to increase power system reliability.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1371/journal.pone.0187892
Publisher: Public Library of Science
Keywords: RTV coating; Lightning; Polymer insulator
Depositing User: Nabilah Mustapa
Date Deposited: 05 Mar 2018 01:22
Last Modified: 05 Mar 2018 01:22
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1371/journal.pone.0187892
URI: http://psasir.upm.edu.my/id/eprint/59432
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